Answer:
The volcanoes provided, on the surface of the earth, the heat, water and the powerful cocktail of organic compounds (hydrogen sulphide, arsenic) that are at the beginning of life. ... The intense performance of CO2 (carbon dioxide) volcanoes allowed the Earth's heat to fix itself permanently in our atmosphere.
Explanation:
During which phases of the cell cycle are chromosomes composed of two chromatids?
Answer:
The correct phases are S phase, prophase, anaphase.
Explanation:
The cell cycle, the sequence of events spanning the period from the completion of one cell division to the end of the next division, involves both the division of the cell nucleus (karyokinesis) and the division of the cytoplasm (cytokinesis). S phase, the next section of the interface, is marked by a dramatic increase in DNA synthesis and the synthesis of histones which are major cellular proteins bound to DNA. The cell is preparing for the start of mitosis. Chromosomes duplicate lengthwise, and each chromosome consists of two identical "chromatids."During prophase, the degree of packing of the chromatin increases, so the chromosomes become shorter and thicker and the centromeres begin to become visible. Each of the chromosomes, due to its duplication in S phase, is made up of two identical chromatids, called sister chromatids. Anaphase is the short phase, the sister chromatids begin to separate and migrate to the poles. Once the two chromatids separate, each is called a chromosome.
2. Explain how similar and different sexual reproduction in plants and animals is?
Answer:Both plants and animals reproduce sexually, producing a male and female gamete, which fuse to form a zygote. However, plants are also able to reproduce asexually, unlike most animals. ... In sexual reproduction in animals, the two gametes are the spermatozoa and the oocyte, which when fused become the ovum.
Explanation:
From Mendel's first set of experiments, he concluded that
a
there are two factors controlling each characteristic
he studied.
b the two factors separate and go to different
gametes.
с
of the two factors, one of the factors dominates the
other factor.
d all of the above are correct
Answer:
d. all of the above are correct.
Which temperature do you think is better for using water as a solvent and why?
Answer:
The hotter the water, the better the solvent
Explanation:
The higher, the better
A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach. The sand is now much darker than it used to be. Scientists studying the area are most likely to predict which outcome?
A.
Some of the light-colored crabs will try to change their body color to be darker and pass on those traits to their offspring.
B.
Some of the light-colored crabs will try to change their body color to be lighter and pass on those traits to their offspring.
C.
Some of the crabs born with the body color traits that do not allow them to escape the birds will likely survive and pass on those traits.
D.
Some of the crabs born with the body color traits that allow them to escape the birds will likely survive and pass on those traits.
Answer:
Your answer is D).
Explanation:
If the crabs are able to avoid being eaten by the birds, then they are most likely darkly colored to blend in with the dark ashen sand, and as Charles Darwin theorized: survival of the fittest.
P.S.- After the birds leave for the day, the crabs can finally get back to vibin' on the beach
In the experimental set up above there are bubbles being
produced. What gas would be inside the bubbles?
Answer:
carbon dioxide
Explanation:
If an organism converts energy in the environment into food, what is the ecological role
of the organism?
Answer:
I'm guessing that's a decomposer.
Explanation:
Decomposers like mushrooms use dead animals, plants, and nutrients in their environment to make their own food.
Ionic bonds are formed between _____ and involved the ____ of ions
Answer:
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
:
10. The orbit of the Moon around Earth is about:
a 25 days
6. 28 days
C. 29.5 days
d. 30 days
the remains of once-living organisms are called what
I’ll mark u as brainliest! Correct answer only
Why enzymes of bacteria are not destroyed while the enzymes of plant destroyed at 78 C
Answer:
i need more information to answer this
Explanation:
Answer:
the enzymes in the bacteria are more heat tolerant
Explanation:
Explain how mRNA is formed from the DNA template.
Answer:
mRNA is “messenger” RNA. mRNA is synthesized in the nucleus using the nucleotide sequence of DNA as a template. This process requires nucleotide triphosphates as substrates and is catalyzed by the enzyme RNA polymerase II. The process of making mRNA from DNA is called transcription, and it occurs in the nucleus.
The diagram below illustrates changes over time in a population of foxes in the
wild.
What process is illustrated in the diagram?
extinction
overproduction
natural selection
artificial selection
Which of the following occurs as electrons are passed to various proteins through the electron transport chain [in the light-dependent reaction]?
A. Two hydrogen ions are bound to a free oxygen ion, generating a molecule of water.
B. They attach to NADPH, forming NADP+.
C. An electrochemical gradient of protons across the thylakoid membrane is established.
D. They are boosted to an even higher energy level.
Answer:
An electrochemical gradient of protons across the thylakoid membrane is established.
Explanation:
When resources are stable over a long period of time, a species' population can be expected to
O die out.
o increase.
O stay the same.
O decrease.
In an environment with stable availability of resources, the population can still grow because there are enough resources for this population to survive. Option B. The species' population can be expected to increase.
This question is related to growth models.
Logistic growthA growing population that inhabits a limited space is gradually affected by density, rebounding in the multiplication rate.
The population growth per capita rate decreases as population size increases.
The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
Carrying capacityCarrying capacity refers to the maximum point at which the environment can support a growing population.
K is a constant. It coincides with the population size when natality rate and mortality rate are equal to each other. This is the equilibrium point.
• If the population size, N, is inferior to K (N<K), the population can still grow.
• When N approximates to K, the population´s growth speed decreases.
• When N=K, the population reaches equilibrium,
• When N is superior to K (N>K), the population must decrease in size because there are not enough resources to maintain that size.
So when the population size exceeds K, carrying capacity makes the population decrease in size.
But if there is a constant availability of resources, the population can still grow because there are enough resources for this population to survive. In this situation, N<K.
When resources are stable over a long period of time, a species' population can be expected to INCREASE. Option B.
You can learn more about growth models at
https://brainly.com/question/16354435
explain the process of dialysis.. and who invented/ discovered this process?
How many kg is a 145-pound woman? 1 pound=0.45 kg
Answer:
65.25kg
Explanation:
im pretty sure it would be 65.25 kg if I did the math right
What are the two types of adaptations that plants can show?
a.Physical characteristics and life cycle differences.
b. Life cycle differences and color differences.
c. Physical characteristics and different food sources.
d. Physical characteristics and behavioral differences.
Answer:
There are two main types of adaptation: physical and behavioral. Physical adaptations are special body parts that help a plant or animal survive in an environment.
Explanation:
Physical characteristics and life cycle differences.
If you are studying a gene within DNA and find out that guanine makes up 41% of it, how much is Adenine?
3. After learning about chemical reactions, Olivia investigated different
kinds of chemical changes using substances she found in her kitchen
so she could see these changes. Which of the following can occur when
a chemical reaction takes place? Choose the three statements that
apply.
Answer:
ABC
Explanation:
Lets say baking soda and vinegar when they react there is a chemical reaction where bonds break and from changing it into a new compound no longer just baking soda and vinegar.
Please hurry!!!!!!What 2 criteria determine passive transport?
Answer:
The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins. The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration, and/or osmosis.
Explanation:
I'm sorry if it is wrong
Embryology
Define:
Use it in a sentence:
Answer:
Scientists can use embryology to determine that many organisms have common ancestors.
Explanation:
choose the correct statement about the earth crust A. the earth crust is thin and could be compared to an eggshell B. most of the earth crust is only 6 km deep C. the earth crust is around 200 km deep D. the earth crust is the thickest layer
''A. the earth's crust is thin and could be compared to an eggshell'' is the correct answer.
Why earth's crust is considered an egg shell?The egg is considered a tiny model of the Earth. The thin shell of the egg represents the Earth's crust which is divided into plates. Both earth and egg have a thin and brittle shells. The crust of the earth is broken into various pieces like the cracked shell of a boiled egg. The mantle of the earth is like the egg white part whereas the core of the earth is present in the center like the egg yolk. The earth's crust is broken into pieces that geologists called it plates. The inside of the planet earth is layered like an egg. Scientists considered the surface of the Earth to be cracked like a big eggshell. They call these pieces tectonic plates that cover the Earth. The plates float slowly on the surface and sometimes crash with each other, and move away from each other.
So we can conclude that option A is the right answer about the earth's crust.
Learn more about the earth here: https://brainly.com/question/25624188
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The purpose of isolation techniques is to:
Answer:
Isolation practices are designed to minimize the transmission of infection in the hospital, using current understanding of the way infections can transmit. Isolation should be done in a user friendly, well-accepted, inexpensive way that interferes as little as possible with patient care, minimizes patient discomfort, and avoids unnecessary use.
Explanation:
The processes of diffusion and active transport are both used to * break down molecules to release energy move molecules into or out of cells of the body bring molecules into cells when they are more concentrated outside of the cell move molecules against a concentration gradient, using ATP molecules
Answer:
move molecules into or out of cells of the body
Explanation:
Majorly, there are two types of transport used by living cells. These are; passive and active transport. Passive transport involves the movement of molecules down a concentration gradient without the need for energy (ATP) input. Example is DIFFUSION AND OSMOSIS.
On the other hand, active transport is a type of transport that moves molecules against a concentration gradient (low to high) with the aid of energy input (ATP). Example is sodium-pottasium proton pump.
Although there are obvious differences between these two processes (diffusion and active transport), but they both MOVE MOLECULES INTO OR OUT OF CELLS OF THE BODY.
Which of these is a mechanical wave?
Olight
O sound
O gamma ray
O electromagnetic
Answer:
sound
Explanation:
Our voices communicate _____.
a.
thoughts
b.
emotions
c.
credibility
d.
all of the above
Answer:
D All of the above
Explanation:
All people use comunicatiln for each and every thing that is listed.
whats the Location for Postsynaptic
Answer:
is located on an axon
please help! Out of the 100 cells shown, how many are in the process of dividing?
Answer:
I think 7 cells are going to divide
Answer:
13?
explanation