What is always at the start of natural selection?

A: reproduction
B: mutation
C: passing on genes

Answers

Answer 1

Answer:

passing on genes

Explanation:

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.


Related Questions

Since the atoms in sugar come from water and air, plants are built mainly from material in blank and blank


3:54 4/5/22

Answers

Answer:

look im not 100% sure but i beleive it would be Carbon Dioxide and Sunlight

Explanation:

Sorry if im wrong

The use of dna fingerprinting relies on the fact that:.

Answers

Two people do not have the same DNA, except identical twins.

What is a
theory?
A. a scientific
explanation for a set of
observations that can
be tested
B. a proven, universal
truth that states what
happens
C. a well-tested
explanation as to why
something occurs that
is generally accepted
D. an assumption
made about an
experiment

Answers

Answer:

A.  A scientific explanation for a set of observations that can be tested.

Explanation:

Theories can be proven or rejected, just like hypotheses.

Hope this helps!

Your answer is A.  a scientific

explanation for a set of

observations that can

be tested

Which trait is least likely to be modified by environmental influences? life span height blood type weight

Answers

Life span is the correct answer

Answer:

It's blood type

Explanation:

im in k12 and had a quiz about it.

If the following events are arranged in the order in which they occur for an animal hiding and holding still in response to seeing a predator, which is the fourth event in the series?.

Answers

Animal hiding-holding still response follows the reflex arc sequence. The fourth event in the series is option B) signaling by efferent PNS neurons.

When the animal receives the stimuli, it responds to them. In the case of hiding-holding still response, the animal might freeze due to motor inhibition that reduces excitatory signals.

The reception and reaction to stimuli follows the reflex arc sequence.

What is reflex arc?

The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts.

The correct answer is B) signaling by an efferent PNS neurons.  

Note: Due to technical problems, you will find the complete explanation in the attached files.

You will learn more abuout the reflex arc at

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Which of the following is a negative consequence associated with both slash-and-burn and monoculture?
O Decreased yield
O Increased pollution
O Ecosystem disruption
O Reduced biodiversity

Answers

Answer:

Increased pollution I think is the right answer

can someone please help me with these two?

Answers

1) I believe it is producers cause produces are the secondhand source of all energy
2) Xylem. If you have a hard time remembering think the the PHloem transports predominantly Food

Answer:

Question 1: (A) Producers

Question 2: (C) Xylem

Explanation:

I am not sure how to explain these because its just their definitions and their role. Sorry!

Hello people ~
Mycorrhiza is an example of
(a) ectoparasitism
(b) mutualism
(c) endoparasitism
(d) predation

Answers

Mutualism I believe
Ex: It is a symbiotic association between fungi and the roots of higher plants.
Mutualism

Explanation:

Mycorrhiza is a symbiotic association between plant roots and fungi, so the answer should be Mutualism.

If your heart beats 70 times per minute, everyday of the year, how many times does it beat in a year?

Answers

Answer:

36,792,000

Explanation:

Using some math, if you say that it beats at 70 pm, then you should look for how much it beats in an hour, which is 4200 (60x70). Then you have to take that number and multiply by 24, which is 100,800. In a day it beats about that amount. Then you take that number and multiply by 365, which is 36,792,000.

Most archaeologists believe that the __________ was one of the earliest centers of plant and animal domestication.

Answers

The answer should be Fertile Crescent.
Hope this helps!

your friend has an aquarium with several exotic fish, a turtle and some plants. She is moving and can't take the aquarium with her. Explain why it would not be a good idea to dump them all into the nearby pond.

Answers

Answer:
Fish and turtles are living organisms so they should not be thrown in a pond

Explanation:

God created living things  and its not nice to kill them we can eat them too but dont kill them they can feel pain too.

A species that remains when an acid has lost a proton is a.

Answers

conjugate base of the acid.

What is the purpose of DNA replication?
to divide a genome in half
newly replicated daughter cells have instructions to make proteins
to prevent tRNA synthesis
to make new mutant offspring

Answers

Answer:

newly replicated daughter cells have instructions to make proteins

15. What is atherosclerosis?
A. the build up of fats and cholesterol in the walls of blood vessels
B. the field in which scientists investigate how many people have a disease
C. a method used to correct arrhythmias
D. another word for high blood pressure

Answers

Atherosclerosis refers to the build-up of fats and cholesterol in the walls of blood vessels (Option A).

What is atherosclerosis?

Atherosclerosis is a disease characterized by the build-up of fats and cholesterol in the walls of blood vessels.

This build-up of fats narrows the blood vessels, thereby difficulting the movement of blood in the bloodstream.

The symptoms of atherosclerosis include, among others, chest pain, shortness of breath and fatigue.

Learn more about atherosclerosis here:

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Answer:

I hope this helps.

Explanation:

How many constitutional isomers are obtained when the following compound undergoes monochlorination?.

Answers

The constitutional isomers that are obtained when the compound -methyl cyclopentane undergoes monochlorination are five in number.

What is Monochlorination?

This term is used to describe the process by which chlorination occurs using a single chlorine atom.

Monochlorination is used to convert lots of chemicals into commercially viable chemicals.

Learn more about Monochlorination at:

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Models of both atmospheric and oceanic circulation show predictable patterns of air and water movement across the globe. The
phenomenon that MOST directly causes these atmospheric and oceanic circulation patters is

Answers

Coriolis effect is the phenomenon that most directly causes these atmospheric and oceanic circulation patterns.

What is Coriolis effect?

This is defined as an apparent deflection of the path of an object that moves within a rotating coordinate system.

Atmospheric and oceanic circulation patterns aride from deflection of the direction of air and water currents moving towards or away from the poles.

Read more about Coriolis effect here https://brainly.com/question/3650165

Which sti if left untreated can cause pelvic inflammatory disorder.

Answers

Answer:

If you have chlamydia and it's left untreated, it may develop into PID within a year.

PLS I need help with this

Answers

Answer:

The answer is C

Explanation:

prophase is first, meta is second, ano is third and telo is last

Answer:

prophase,metaphase,anaphase,telophase

what is vegatative propogation?​

Answers

Answer:  Vegetative propagation is an a s exual method of plant reproduction that occurs in its leaves, roots and stem.

Answer:

VEGETATIVE PROPAGATION

regeneration of new plant from the vegetative part or organ of the parent plant is called vegetative propagation vegetative propagation is used full to separate the plant in wider region mother plant get favourable condition if then colonized to the reason by vegetative propagation the offspring adapted

1 NATURAL VEGETATIVE PROPAGATION-

BY ROOT -

the interact root of several Woody plants such as guava sisoo grow just below the soil produce advantages but should just below the soil produce but should develop from this bird which give rise to new plant

BY STEM -

stamp is the source of natural vegetative reproduction in several plants modification or found in stem to perform vegetative propagation

a Runners- the weak stem of creep forward on the soil that downwardly from node axillary bud are present in the axils of scale leaves node

b s ucker - rise time in similar to runner but it is underground its main stem grow upward and develop advantages root from underground

c offset- the thick and fleshy runner of hydrophytes plant is called offset

BY LEAVES

Titan plant develop adventirious bud on their leaves this word after separating from Mother plant give rise to new plant

BY BULBILS

they are fleshy but which are produced in the axils of leaves in the auxiliary Bud

ARTIFICIAL VEGETATIVE PROPAGATION-

GRAFTING

it is the most common method of vegetative reproduction in this method variety of shame spices can be converted into plant of better variety in the technique of trade off to plant are joined in such portion of one part called stock is joint with another plant is called scion

BUDDING-

it is the superior and modern method of plant propagation in this method but of plant are superior varieties grafted in the stem of plant in variety after making oblique you cut up to the bark of stem after fue with this but join with plant as result formed on the new plant

LAYERING-

the method of inductor root formation the branches while they are still attached to a mother plant is called layering

CUTTING -

any part of plant root stem or leaf which has the power to develop itself into a new plant after separating from the mother plant is called cutting

IMPORTANCE OF PROPAGATION

the plant which have lost their power to produce seeds like Banana grapes Rose in it can be propagated by vegetative means only the plant which produce seed in less number are usually propagated vegetative leaf the change of some chemical x-ray and environmental variation as temperature can be studied easily in plant which vegetative propagation the tissue culture technique of vegetative propagation is used to raise disease free plant

why did mammals evolved so quickly after the extinction of the dinosaurs

Answers

“When the dinosaurs went extinct, access to different foods and environments enabled mammals to flourish and diversify rapidly in their tooth anatomy and evolve larger body size,” said lead author Madelaine Atteberry from the University of Colorado Geological Sciences Department.

If oxygen is absent during the second stage of cellular respiration,
a.) fermentation will occur.
b.) the Krebs cycle begins.
c.) the electron transport chain works more efficiently.
d.) glycolysis stops.

Answers

Answer:

Fermentation will occur.

The Krebs cycle occurs when acetyl-CoA combines OAA (oxaloacetate), C makes no sense, and Oxygen is vital for glycolysis...

How frontal inversion affect the environment

Answers

Convective clouds cannot go high enough to produce showers and visibility also greatly reduced due to the accumulation of dust and smoke particles.

What is frontal inversion?

Frontal Inversions are the inversions that is caused by a shallow "cold air" blowing in under warmer air. An inversion traps air pollutants, such as smog, close to the ground.

So we can conclude that convective clouds cannot go high enough to produce showers and visibility also greatly reduced due to the accumulation of dust and smoke particles.

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The sea dog francis drake sailed along the coast of _______

Answers

Answer: West African Coast

Explanation:Hawkins sailed with his cousin (and soon-to-be Sea Dog) Francis Drake to the West African coast in order to capture slaves for trade in the Caribbean and South America, privateering along the way.

Which of the following statements about energy and trophic levels is not true? a. the amount of available energy decreases at each higher trophic level. b. the energy conversion efficiency decreases at higher trophic levels. c. the net production of energy is higher at lower trophic levels. d. none of the above please select the best answer from the choices provided a b c d

Answers

All statements are true about the energy and trophic levels. So, the correct option is D. None of the above.

What are trophic levels?

Trophic levels are the levels of energy transfer from lower to higher levels.

There are five levels of trophic level.

The lower level contains autotrophs or producers. And the uppermost level contains big animals or tertiary consumers.

The energy level decreases on going to the higher levels because some amount of energy always lapses as entropy.

Thus, the correct option is D.

Learn more about trophic levels

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Answer: D

Explanation: fr fr

The largest amount of DNA in plant cell is contained in

Answers

Answer:

In plant cells, most DNA is located in the nucleus, although chloroplasts and mitochondria also contain part of the genetic material

how are utah and mexican praire dogs genes alike

Answers

Answer:

In terms of genetic variation, allelic richness (A) estimated through rarefaction resulted in 1.6–3.0 mean alleles per colony, and no private alleles were found. Mean genetic diversity (HE) was 0.525 (SD = 0.11), with values ranging from 0.276 (SD = 0.25) to 0.618 (SD = 0.09).

Explanation:

Utah prairie dog (Cynomys parvidens), and Mexican prairie dog (Cynomys mexicanus)—all of which may be considered rare (Hoogland 2006a). After 200 years of shootings, poisonings, conversion of habitat, and more recently plague, prairie dog numbers are a fraction of what they once were. Two of the species (Utah and Mexican) are listed as threatened or endangered under the Endangered Species Act (ESA).

Question: As a result (because) of diffusion, the concentration of many types of substances:
A: always remains greater inside a membrane.

B: eventually becomes balanced/equilibrium on both sides of a membrane.

C: always remains greater on the outside of a membrane.

Answers

|| ▼ Answer ▼ ||

B: eventually becomes balanced/equilibrium on both sides of a membrane.

|| ✪ Explanation ✪ ||

Diffusion is the movement of molecules from a high to a low concentration. The effect of diffusion on different substances' concentrations is balance/ equilibrium on both sides of a membrane. In the process of the movement of molecules, the concentration becomes balanced. A typical example of diffusion is a perfume sprayed inside a room. The smell of the perfume will eventually be balanced in the entire room.

Hope this helps!

If you have any questions please ask.✪

Which of the following are examples of habitats where sympatric speciation could occur?
Choose one or more:
A. different locations along the Great Barrier coral reef in Australia
B. opposite sides of a mountain range
C. the North Rim and South Rim of the Grand Canyon
D. an elevational gradient on the south-facing slope of a mountain
E. varying water depths in a lake

Answers

An example of habitats where sympatric speciation occur is the North Rim and South Rim of the Grand Canyon.

What is Sympatric speciation?

Sympatric speciation refer to evolution of a new species or the creation of new species from the ancestal species that is alive and surviving while both of them continue to live in the same geographic region. In evolutionary biology and biogeography, sympatric refer to organisms that have ranges and their ranges overlap so that they occur together some places.

The individual are dependent on some physical needs like shelter, food and so on.

Therefore, An example of habitats where sympatric speciation occur is the North Rim and South Rim of the Grand Canyon.

Learn more about Sympatric speciation here.

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The inner cell mass cells of the fetus are destined to become:

Answers

The inner cell mass are destined to become Embryonic Stem Cells or ESC’s

Which of the following is not a future consequence of bioenergy use?

Increased ethanol production
Fewer greenhouse gas emissions
Increasing prices for biofuel crops
Less deforestation and land use

Answers

We can confirm that Increased ethanol production is not a consequence of bioenergy use.

Why is ethanol production not a consequence of bioenergy?

This has to do with the fact that there would be no need for increased production of ethanol when using bioenergy. This is due to the fact that biomass naturally produces ethanol and that most bioenergy does not rely on ethanol to be created.

Therefore, we can confirm that Increased ethanol production is not a consequence of bioenergy use.

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Answer: less deforestation and land use

Explanation: took test

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