Answers
The Steady State Theory state that the density of the universe was remaining constant.
Steady State Theory:In cosmology, a steady-state theory is a perspective that holds that the universe is constantly expanding while maintaining a constant average density. According to this theory, the matter is continuously created to form new stars and galaxies at the same rate that older ones fade away due to their expanding distance and accelerating recession. The average density and configuration of galaxies are the same as any location in a steady-state universe, which has no beginning or end in time.
British scientists Sir Hermann Bondi, Thomas Gold, and Sir Fred Hoyle first proposed the hypothesis in 1948. Hoyle expanded on it in order to address issues that had come up in relation to the alternative big-bang theory. According to the hypothesis, in order to maintain a constant average density of matter across time, the new matter must constantly be created, primarily as hydrogen. With nearly five times as much dark matter, the amount needed is small and not immediately observable: one solar mass of baryons per cubic megaparsec every year, or one hydrogen atom per cubic meter every billion years.
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Related Questions
What is a change in the DNA sequence that can be beneficial harmful or niether ?
Answers
Answer:
A mutation
What can cause changes in a DNA sequence?
A mutation is a change in the DNA sequence. There are several different methods by which mutation happens. Of course, chemically produced mutations receive the most media attention. There are a wide range of substances that can cause mutations, usually by attaching to the DNA and causing it to break, requiring an incomplete repair, or by preventing DNA replication, forcing the replication machinery to repeat the DNA poorly.
However, other factors, such as exposure to radiation or light, can also cause DNA mutations. In reality, UV and X ray light are known to cause mutations by changing the DNA's base composition or causing DNA breaks.
Mutations are also spontaneously caused by DNA replication. Although it occurs extremely infrequently, the replication complex does occasionally make mistakes and insert the incorrect DNA base, which leads to a significant amount of mutations over the course of generations.
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Eddie
A mutation in the DNA sequence can be beneficial, harmful, or neither, depending on its impact on the organism.
Mutations—changes in the DNA sequence—can affect an organism. Mutations that improve survival and reproduction are helpful. Mutations can make an organism disease-resistant or adaptable.
Mutations can affect the organism's health or fitness. Mutations can cause genetic diseases, diminished fertility, and lower survival rates. Neutral mutations don't affect the organism's phenotypic or fitness. They may occur in non-coding DNA or silently modify the genetic code, leaving the amino acid sequence of a protein untouched.
Mutations' effects depend on their genomic location, gene function, and environment. Some mutations help evolution and adaptability, whereas others harm individuals or populations.
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Fill in the blank.
1. Helping children to evaluate and overcome frustrating situations is one way to prevent ________
2. Accepting and supporting a child fosters that child's __________
3. Giving a child a reason for a request helps to foster ________
and _______ .
4. When a caregiver sets limits so that children know what they can and can't do, the caregiver is
expressing ________
of the children's actions.
5. When a caregiver offers to help a child pick up blocks, the caregiver alts as a ________
of prosocial behavior.
6. Self-esteem is increased by ______________
a child's efforts.
Answers
Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
aggressionself-esteemself-esteem; self-regulationsupportmodelsupporting What are the methods used to help your child get control of their anger?A lot of people have no idea about social skills. We are known to often picked them as we grow up learn by observing people close to us such as out parents and in interactions with others.
A way that a child can manage their anger is for a parent to teach our children to be able to know and deal with their anger, as we can be able to prevent its negative effect before it occur.
Therefore, Helping children to evaluate and overcome frustrating situations is one way to prevent aggression.
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d. Ecological relationships How many chromosomes does an individual human person have? a. 23 b. 46 c. 64 d.82
Answers
Answer:
there is 46 chromosome in a human
Answer: there is 46 chromosome in a person
Explanation:
9. What does each letter in the diagram below represent?
A.
B.
C.
D.
E.
F.
F
G.
H.
I.
J.
C
Answers
The layers composing the Earth are the core, mantle, and Crust. A) Internal core, B) External core, C) Mesosphere, D) Astenosphere, E) Lithosphere, F) Oceanic crust, G) Continental crust, H) Litosphere, I) Superior mantle, J) Astenosphere
What are the layers of the Earth?Three main layers compose the Earth.
The crustThis is the most external layer.
It is located right upon the mantle and is divided into many plates, that move over it.
It is composed of the oceanic basaltic plate (6-12 km) and the uppermost continental granitic plate (25-70 km).
The mantleThis is the second layer that composes the Earth.
It is a very hot and dense rock that is capable of flowing.
Convection currents occur in this layer, rising hot melted material from the deepest region and sinking cold solid material from the surface.
Three layers compose the mantle,
Upper mantle (40-400km)Transition zone (400-670km)Inner mantle (2285 km)The coreThis is the third layer and is divided into two sublayers,
- the solid inner core (1216 km)
- the liquid outer core (2270 km)
The core is mainly composed of Ferrum and nickel, and its temperature is about 6000ºC.
The extremely high temperatures are closely involved in material circulation, keeping the Earth's surface temperature, and electromagnetic field.
The core composes the EndosphereThe Internal mantle composes the MesosphereThe Transition zone and superior mantle compose the AstenosphereThe Crust composes the LithosphereA) Inner core
B) Outer core
C) Mesosphere
D) Astenosphere
E) Lithosphere
F) Oceanic crust
G) Continental crust
H) Litosphere (Crust)
I) Upper mantle
J) Astenosphere
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30 points!! Please helppp!! It’s the last question!! The following diagram shows the branching tree for four kingdoms and some of their shared derived characteristics.
What shared characteristic can be written at point X? Use complete sentences to explain your answer.
Answers
These are synapomorphies, or shared derived features. These are the traits that arose in particular groups of creatures' progenitors and were then passed on to those groups' offspring (or lineages).
What is synapomorphies?A unique character or character state that has evolved from its ancestor is known as an apomorphy.An apomorphy that is shared by two or more taxa is referred to as a synapomorphy and is thought to have originated in those taxa's most recent common ancestor. Synapomorphy suggests homology in cladistics.A characteristic or trait obtained through evolution from a similar ancestral form and shared by two or more taxonomic groups.Synapomorphies are traits that a group of taxa share because they descended from a single ancestor. Thus, synapomorphies provide as proof of historical connections and the corresponding hierarchical structure.An advanced character state that is shared by two or more taxa and that is obtained through evolution.It is inherited from the most recent common ancestor, whose own ancestor is presumed not to contain such qualities.Learn more about synapomorphies here:
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Which disorder is a less severe but chronic form of depression?
Major depressive disorder
Bipolar disorder
Persistent depressive disorder
Post-traumatic stress disorder
Answers
Answer:
Persistent depressive disorder.
Persistent depressive disorder, known as dysthymia or low-grade depression, is less severe than major depression but more chronic. It occurs twice as often in women as in men. Persistent depressive disorder (PDD) is a serious and disabling disorder that shares many symptoms with other forms of clinical depression.
Together, the right and left cerebral hemispheres make up which part of the brain?.
Answers
Hope this helps
What blood types are possible for a child with a mother who has a blood type of O, and a father with a blood type of A,
and is homozygous.
Answers
The mother has an O blood type means genetically she has [tex]I^{O} I^{O}[/tex]and the father is homozygous means he has [tex]I^{A} I^{A}[/tex]in this situation the child will have only A blood group and genetically the child will have [tex]I^{A} I^{O}[/tex]. Thus the answer is blood type A.
What is the genetic constitution of all the blood groups?The blood group type will have two genotypes one homozygous condition that is type [tex]I^{A} I^{A}[/tex] or the heterozygous condition that is [tex]I^{A} I^{O}[/tex] but in both conditions phenotypically the person will have type A blood group.
The same happens with the type B blood group where the homozygous [tex]I^{B} I^{B}[/tex]or the heterozygous [tex]I^{B} I^{O}[/tex] in both genotype conditions phenotypically the person will have a B blood group.
This condition is not applied in the O blood group as it will always express in homozygous condition as if A or B present then will dominate so if a person has blood type O then the person always has [tex]I^{O} I^{O}[/tex] in their genotype.
The condition for having blood group O is the father and mother both should have heterozygous genotype then there will be a possibility the child will have O blood group.
Here, in the question, both parents are homozygous as the mother is expressing blood group O then must have homozygous [tex]I^{O} I^{O}[/tex] and it is already mentioned in the question that the father is also homozygous that is [tex]I^{A} I^{A}[/tex] . The Punnett square is given in the image attached.
Hence, as both parents have homozygous genotype and the father has blood type A which is dominant so children will be heterozygous and have A blood group as A is dominant over O.
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Animal Diversity Lab Activity:
For this lab activity, you will create a
phylogenetic tree with 20 Sponge Bob
Characters and 35 different “shared
derived characteristics” for members of
the Animal Kingdom. Note if there are
any instances of convergent evolution in
these characteristics.
The lab must follow these keys:
-The tree is not so small and squished that I can’t read the names or see the characters.
-All 20 Sponge Bob characters are included
-All 35 traits/characteristics are used. Any instances of convergence are listed.
-All traits/characteristics are in the correct place and clearly describe the intended character.
Sponge Bob Characters:
• Sponge Bob Square Pants
• Squidward Tentacles
• Patrick Star
• Sandy Cheeks
• Mr. Krabs
• Pearl Krabs
• Gary
• Shark with fake arms
• Sheldon J. Plankton
• Mrs. Puff
• Karen
• Man-Ray
• Larry the Lifeguard
• Mermaid Main & Barnacle Boy
• Jellyfish Fields
• Whelks
• Bullworm
• Nematodes
• Potty the Parrot
• Madam Hagfish
SHARED DERIVED CHARACTERISTICS
• Bilateral Symmetry
• Spiny Skin
• Segmented Worms (Annelids)
• Eutherian
• True Coelom
• Jaws
• Round bodies(Pseudo-coelom)
• Radial Symmetry
• Crustacean
• Land-Dwelling
• Presence of a nucleus
(Eukaryotic)
• Multicellular
• No true tissues (Noneumetazoan)
• Swim Bladder
• Chordate
• Phylum Porifera
• Soft body(Gastropod)
• Osteichthyes
• Protist
• Tetrapod
• Spicules
• Cnidocytes
• Medusa Body Form
• Dinosaur
• Mammal
• Homeothermic
• Amniotic Egg
• Milk & Hair
• The Future of Animal Evolution
• Exoskeleton
• Ecdysis
• Deuterostome (Blastopore
becomes anus)
• Jawless Chordate
• Buoyant Liver
• Chondrichthyan
Answers
The phylogenetic tree of organisms within the animal kingdom include characteristics below:
Ancestral protistsTissuesbody symmetryGerm layersBody cavityPoriferaPlatyhelminthesNematodaAnnelidaMolluscaArthropoaEchinodermataChordataWhat is phylogenetic tree?A phylogenetic tree simply refers to a branching diagram or a tree showing the evolutionary relationships among various biological species of both plants and animals based on their similarities and differences; either genetically or physically
Generally, animals; be it vertebrates or invertebrates has the few characteristics below:
All animals are multicellular organismsAnimals are also heterotrophic, meaning; they depend on other organisms for food or they obtain their energy by consuming energy-releasing food substances.Animals typically reproduce sexually.All animals are also made up of cells that do not have cell walls.In conclusion, the phylogenetic tree of organisms within the animal kingdom include all characteristics mentioned above
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Which of the following is the movement of molecules along a concentration gradient by spontaneous random motion to achieve a uniform distribution?
Answers
Diffusion is the movement of molecules along a concentration gradient by spontaneous random motion to achieve a uniform distribution.
What is diffusion?Diffusion is the movement of water vapor from regions of high concentration (high water vapor pressure) toward regions of lower concentration.
Diffusion can also be defined as the random movement of molecules (fluids) along a concentration gradient until even distribution is achieved.
Therefore, diffusion is the movement of molecules along a concentration gradient by spontaneous random motion to achieve a uniform distribution.
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Too much logging in the Oyamel fir forests could lead to the eastern monarch butterfly going extinct because
Answers
Answer: They wouldn't have anywhere to live. The fir trees are a home to the butterflies cutting the trees means cutting their homes down.
Explanation:
so yea
Answer: A, the entire population of the species spends winter in oyamel
Sunlight is the ultimate source of energy in the ecosystem.
Answers
Answer: yup. That, and water or air.
Explanation:
Carbon is transferred from the
atmosphere to organisms
through...
A. photosynthesis.
B. precipitation.
C. combustion.
Answers
Answer:
A
Explanation:
I believe the answer is through photosynthesis
Help with somebody who is an expert in meteorology or took any class in it
Answers
I would say this isn't a question but more a lack of experience in a field of science or a subject.
So I will help by giving a brief explanation on what it is.
The study of the Earth's atmosphere and the changes in temperature and moisture distribution that give rise to various weather situations is known as meteorology. Precipitation (rain and snow), thunderstorms, tornadoes, hurricanes, and typhoons are a few of the important topics of research.
Thank you,
Eddie
Part C
AP wave is a type of seismic wave called a longitudinal wave, or pressure wave. Longitudinal waves occur when the
material that carries the wave is compressed and stretched. Aside from seismic waves, what is an example of a
longitudinal wave that you have observed?
Answers
Answer:
Sound wave is an another example of longitudinal wave. Sound wave is a vibration that is transmitted through a medium, such as air, water, and metals. Ultrasonic wave is defined as “inaudible sound with high frequency for human” the frequency of which generally exceeds 20 kHz. These days, sound wave which is not intended to be heard is also called ultrasonic wave.
Answer: A wave traveling through a compressed spring or a sound wave traveling through the air are examples of longitudinal waves.
Explanation: Simple answer from Edmentum
Give one function for this structure
Answers
Answer:
Explanation:
The pen is is the male organ used for urination and intercourse. The pen is located above the scrotum. It is made of spongy tissue and blood vessels. The shaft of the pen is surrounds the urethra and is connected to the pubic bone.
How does evolution occur through natural selection?
A. Individuals die instead of adapting when changes in the environment occur.
B. Individuals different from their population are quickly killed by the rest of the species.
C. Individuals with a low fitness are more likely to survive.
D. Individuals best suited to their environment are more likely to survive and pass on genes.
Answers
Evolution occurs through natural selection when individuals best suited to their environment are more likely to survive and pass on genes; option D
What is evolution?Evolution is the process by which new species of organisms are formed from existing species through gradual changes which occur in these organisms over a long period of time.
Evolution of species can occur through a process known as natural selection.
Natural selection is the process by which species which possess certain features that enable to adapt to changes in their environment survive while those that do not have these features die.
In conclusion, natural selection is one the processes by which evolution occur.
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Genotype: BBee
Phenotype:
DONE
V fur and
V eyes
Answers
[tex]black \: dominant = BB \\ phenotype = black \: fur \\ \\ red \: eyes \: recessive = ee \\ (not \: masked \: b y \: the \: dom \: trait) \\ phenotype = red \: eyes[/tex]
Answer:
Explanation:
Genotype: BBee
Phenotype:
✔ black
fur and eyes
red
After watching the CrashCourse video on Taxonomy: Life's Filing System, write a summary of three things you
learned about taxonomy from the video. Zooalogy
Answers
Watching CrashCourse video, I learned the 3 basic elements of taxonomy, which are the three domains are Archea (formed by prokaryotic beings, such as archaea), Bacteria (formed by prokaryotic beings, such as bacteria and cyanobacteria) and Eukarya (formed by eukaryotic beings).
What is the concept of taxonomy?Taxonomy is the branch of biology responsible for identifying and classifying all animals and plants that inhabit the Earth, based on the different characteristics they share with each other.
What is taxonomy and examples?Taxonomy is the area of Biology that classifies, organizes and describes living beings. It is like a library that organizes each group into its categories, in an order that facilitates understanding and searching for features.
With this information, we can conclude that Taxonomy is a method used in biology to name, identify and classify living beings.
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Drag each tile to the correct location.
Sort the statements based on whether they describe the lives of small stars, large stars, or both.
Answers
The correct location of each tile is as follows:
Small stars - It becomes a white dwarf when fusion endsSmall stars - It can fuse hydrogen for billions or trillions of yearsLarge stars - It may turn into a black hole at the end of its lifeLarge stars - It becomes a neutron star after the supernova phaseBoth - It increases in size when core hydrogen is used upWhat are stars?Stars are large celestial bodies which produce heat and light energy as a result of the nuclear reactions occurring within the core of the stars.
Stars are composed mostly of hydrogen and helium gas which undergo nuclear fusion reactions.
Stars have lifespans, and the fate of the star at the end of its lifespan depend on whether they are small or large stars.
The correct description and as such location of each tile is as follows:
Stars that become white dwarves when fusion ends are Small stars.
Stars that can fuse hydrogen for billions or trillions of years are Small stars.
Stars that may turn into a black hole at the end of their lives are Large stars.
Stars that become a neutron star after the supernova phase are Large stars.
Both Large and small stars increase in size when core hydrogen is used up.
In conclusion, stars produce heat and light energy by means of fusion reactions.
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Why is cellular reproduction important for homeostasis?
It helps cells make oxygen.
It helps cells make glucose.
It removes waste from cells.
It splits a cell into new cells.
Answers
I need help with questions 3 4 and 5 sorry if the picture is a little blurry
Answers
Answer:
3 the most likely answer is b
because the other choices are unrelated to the question
4 the choices are not appropriate as I think
but contextual answer is most likely c but it has to be the absorbtion of sugar by pancreases
7 answer is obviously c
What causes the characteristic thrashing motion of nematodes?
A. the fluid-filled body cavity
B. the pseudocoelom that acts as a hydroskeleton
C. the blunted head and pointed tail
Answers
B. the pseudocoelom that acts as a hydro skeleton causes the characteristic thrashing motion of nematodes.
The longitudinal muscles of nematodes are contracted to move them. The animal moves by thrashing back and forth because to the tremendous internal pressure that forces the body to flex rather than flatten. Nematodes only have longitudinal muscles, not the two bands of muscles found in other worms. They can only move by clenching the lengthy muscles on either side of their body and wiggling forward, which explains their distinctive thrashing motion.The pseudocoelom serves as a lubricant between tissues, houses coelomocytes, and generates turgor-hydrostatic pressure for the entire animal.Because it is fluid-filled, the fluid's hydrostatic qualities enable a more rigid construction, greatly improving the efficiency of the skeletal system and movement.learn more about nematodes here:
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Answer: B. the pseudocoelom that acts as a hydroskeleton
Explanation:
An individual of the genotype “Aa” mates with an individual of the genotype “Aa”. What is the probability that their first two offspring will both be the “aa” genotype? (Type answer as a probability between 0 and 1)
Answers
Answer:the probability of their first two offspring being aa is 0.25
Explanation:
Because their are 4 possible genotypes for the offsprings
AA Aa Aa aa
And the probability of aa is 1/4
Answer:
1/4
Explanation:
if you look at the attached image, i made a punnett square to represent the relationship. Only one of the squares is aa genotype out of 4, therefore the probability that their first two offspring will both be the “aa” genotype is 1/4.
Which phrase best describes a process represented in the diagram below?* 5 points
---
Fertilized egg
O a zygote dividing by mitosis
a zygote dividing by meiosis
a gamete dividing by mitosis
a gamete dividing by meiosis
Multicellular
organism
Answers
The image shows a zygote dividing by meiosis.
What is cell division?We know that cell division occurs when a cell breaks up to give daughter cells. This could occur by mitosis or by meiosis. In each case, we have two or four daughter cells being formed.
Now we have to look at the image very well. We can see that the process is occurring inside the gamete cells. There is a fertilized egg that divides into two. We know that a fertilized egg is called a zygote.
In conclusion, we can say that, the image shows a zygote dividing by meiosis.
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Which of the following groups of organisms contains a cell wall?
I. Plantae
II. Animalia
III. Fungi
IV. Eubacteria
Answers
From a trough to a peak, the economy goes through
Answers
The economy will then start to shrink as it descends from the peak and enters recession.
What is happening to the economy during the trough phase?The economy's growth rate declined during the depression phase. Up until the demand and supply for products and services, as well as the prices of the factors, reach their lowest point, there is still a further decrease. Eventually, the economy sinks to its lowest point. The economy enters the peak phase when it reaches its highest level of output, which marks the end of growth. After this, a contractionary phase occurs as employment levels and housing starts start to drop.
The time between an economic activity's peak and its subsequent trough, or lowest point, is known as a recession. The economic cycle between its trough and peak is one of expansion.
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IUPAC name of 2,2,3-trimethyl butane
Answers
Answer:
Triptane molecular formula C7H16Which of the following is NOT a behavior of parental care?
A. Feeding
OB. Courtship displays
C. Protection from predators
D. Incubation of eggs
Answers
Parental care is the energy investment in looking after the progeny to ensure reproductive success, at the sacrifice of feeding, mating, and being save. The option is B. Courtship displays.
What is parental care?Parenting is a caring behavior chosen by some species in which parents invest energy in looking after their offspring to ensure their survival and hence, their reproductive success.
K-strategists are the species that perform parenting.
Animals must optimize the invested energy in growing, surviving, reproducing, and leaving fertile offspring. They must ensure the perpetuity of the species. The best way to do it is by reaching sexual maturity, mating, and leaving progeny that also reaches their fertile age. So species choose how to do it and where to invest more energy.
K strategists take care of their offspring and invest too much energy in doing it.
Parents must feed them, an activity that requires most of their energy to produce food or look for it. They must protect their progeny from potential opportunistic predators, so they need to be near the whole time. They need to teach behaviors and habits.And so many other things that require energy investment.
So, when parents take care of their offspring, the energy usually destined for survival and mating activities is now destined for parenting.
Often, parents can not feed because they can not leave their offspring alone. They face predators putting themselves in danger of being hurt. They can not mate even if they are in the reproductive season.
According to this framework, the correct option is Courtship displays. Option B. This is a typical pre-mating behavior in which sexual selection plays a significan role.
The behaviors of parental care are
A. Feeding
C. Protection from predators
D. Incubation of eggs
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Which is not a water quality monitoring parameter?
Select one:
a. habitat
b .turbidity
c. salinity
d. pH level