Which is of the following is necessary for natural selection? 1. There must be a shortage of food 2. There must be a change in the environment, causing individuals to change 3. There must be some genetic differences among the individuals of a species 4. all of the above

Answers

Answer 1

Answer:

It's 3!

Explanation:

There must be genetic differences so the best fitted organisms will survive. If they were all the same then no one would be best fitted and Natural Selection wouldn't be able to occur

It's not 1 because a food shortage isn't required, there's always competition for food sources

It's not 2 because there doesn't need to be a change in the environment for natural selection, just for evolution.

And it can't be 4 if 1 and 2 are wrong!

Hope this helped!


Related Questions

True or false: according to natural selection, all organisms will have an equal chance of survival no matter what their traits are

Answers

No, some animals (at the bottom of the food chain) suffer according to natural selection while other animals who are stronger (likely predators) Will succeed more and have a better chance of survival

What is the melting point of a substance?
(A) When its temperature changes from a
gas to a liquid.
B When its temperature changes from a
liquid to a solid.
© When its temperature changes from a
liquid to a gas.
D When its temperature changes from a
solid to a liquid.

Answers

Answer:

D.) when its temperature changes from a solid to a liquid

Explanation:

At the melting point the solid and liquid phase exist in equilibrium.

It’s d but I’m not sure

Complimentary RNA sequence to ACATTTCAGACCGTC

HURRY

Answers

Answer:

UGUAAAGUCUGGCAG

Explanation:

In rna all codes that are copied from DNA are swap for their base pairs and T is replaces with U

how most of our excretory system is not dedicated to excreting; it’s dedicated to reabsorbing.

Answers

Answer:

Not all animals use the same routes or excrete their wastes the same way humans do. Excretion applies to metabolic waste products that cross a plasma membrane.

The excretory system works with the respiratory, endocrine, urinary and digestive system. It works with the respiratory system because it helps the lungs get rid of carbon dioxide and water vapors. It works with the digestive system to help get rid of wastes that you eat through the anus.

Prompt 4:
The scientists are proposing a new reintroduction site. They want to predict how many ferrets could occupy the
site. Here are some facts about the new site:
.
.
Annual Rainfall - 17.59 inches
Area - 4600 hectares
Number of prairie dog colonies on site - 48
Prairie dog colony size on site - 473.24 individuals/site
Relative Prairie Dog Biomass - 0.3221
.

Answers

Answer:

Black-footed Ferrets are weasel-like in body shape and form but are heavier than ... They are therefore limited to the same open habitat used by prairie dogs: ... (several thousand acres of closely spaced colonies) can support and sustain a ... to 60 hectares of prairie dog colony is needed to support one Black-footed Ferret, ...

Explanation:

Which of the following do NOT explain how fossils can be used to support claims of common ancestry and as evidence of evolution?

Fossils show extinct species that are no longer modern.

Transitional forms show intermediate states between ancient and modern species.

Fossils can show the original purpose of the vestigial structures in modern species.

Fossils show the similarities between modern and extinct species.

Answers

“Fossils show extinct species that are no longer modern”

Through all 4 that one seems the most correct to me.

I need help with my bio homework please help me, thanks ....

Answers

Answer:

Sure what is it?

Explanation:

Answer:

wheres the upload?

Explanation:

Describe a Scientific Process.

Answers

Answer:

hope it helps

Explanation:

The process in the scientific method involves making conjectures (hypotheses), deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions.

What process can change all three rock types in a new metamorphic rock?

Answers

Answer:

The three main rock types are igneous, metamorphic, and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

Explanation:

how magnification and resolution affect the appearance of objects viewed under a microscope​

Answers

Answer:

It allows to see objects more clearly.

Explanation:

Magnification and resolution greatly affects the appearance of objects that can be seen under a microscope​ because these two things make the specimen enlarge in size. Magnification refer to the process of enlarging the apparent size of something to see and observe it clearly while on the other hand, resolution is used to see more details about specimen that can be study in the microscope so we can conclude that both magnification and resolution has a great impact on the appearance of objects.

How can the motion of an object best be described?

Answers

Answer:

In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

Explanation:

What form of heat transfer can travel through a vacuum.
A. Convection
B. Radiation
C. Conduction

Answers

Answer: B. Radiation fo sho.

Explanation: I took a test and it was correct!! ; )

How do genes code for traits

Answers

Answer:

A gene codes for a particular protein that is involved in the expression of a trait.

Explanation:

I hope this information is correct and helps you!

Blood is one of the most important tissues in the body and without it, we could not survive, Blood and other fluids carry oxygen, carbon
dioxide, hormones, nutrients, wastes and pathogen fighting agents, all to maintain our lives.
True
False

Answers

Answer:

Blood is not a tissue, so it should be false.

Explanation:

The answer I believe is false


︶hopefully this helps have a wonderful day!

Which of the following factors is used to define the climatic zones as tropical, temperate and polar

Answers

Answer:

temperature

Explanation:

and this climate zone the warmest months average less than 10° Celsius the North and South Poles have climates that are polar because of the nearby cold air masses for climate region near the equator with warm air mass is is known as tropical so there's more has to do with temperature

Please help me?? I need help labeling the graph using the word bank

Answers

Answer:

Explanation:

Oceanic PlateSubduction ZoneConvection CurrentsAsthenosphereContinental Plate

The Oceanic Plate is located near the ocean ridge. Which represents where magma creates new oceanic crust.

The Subduction Zone is where the tectonic plates meet.  These are called plate boundaries.  

Convection Currents are what drives the movement of rigid tectonic plates in Earth's molten mantle.

The Asthenosphere is the upper layer of the mantle. Which is below the lithosphere (Continental Plates).  

Continental Plates are the outer shell of the mantle.

Let me know if this helps!

Tendrá la intensidad de la luz un efecto en la velocidad de la fotosíntesis, cuando los períodos de exposición están limitados a la duración normal de la luz para una planta

Answers

Answer:

ver explicacion

Explanation:

La fotosíntesis es el proceso mediante el cual las plantas verdes fabrican su propio alimento en presencia de luz solar, clorofila, dióxido de carbono y agua.

La intensidad de la luz afecta la tasa de fotosíntesis, cuanto mayor es la intensidad de la luz, mayor es la tasa de fotosíntesis y viceversa. Cuando hay una mayor intensidad de luz, hay más luz disponible para impulsar las reacciones de la fotosíntesis.

In prokaryotic cells, the DNA is found-
A)Attached to the ribosomes.
B)Floating in the cytoplasm.
C)Contained in the vacuole.
D)Surrounded by the nuclear membrane.

Answers

Answer: B. Floating in the cytoplasm

Explanation: Prokaryotic cells do not have a nucleus or any membrane bound organelles. Therefore the DNA just floats.

One of the old is rock for missions identified on earth is found on the shoreline of Hudson Bay in Canada. This rock forms 4.28 billion years ago. What information does the scientist need to most accurately determine the age of a rock?

Answers

Dont click the link it’s fake.........

In which situation would artificial insemination most likely be used over other forms of treatment?

Answers

Artificial insemination can be used when there is a case of infertility.

This process lets the sperm skip the cervical mucus entirely . doctors often use this process when the reason for the couple’s infertility is unclear.

In case of endometriosis, this process is helpful in mild or moderate cases of endometriosis.

pls help :((((((((((((((((((

Answers

Answer: i believe it's C or D

Explanation:


What is the volume of a square pyramid with a base edge of 14 m and a slant height of 25 m

Answers

Answer:

length of base(l) = 14m

slant height (s)=25m

we know,

slant height(s)=√(l/2)^2 + h^2

or, 25= √(14/2)^2+ h^2

or, 25 = √49+h^2

or, 25^2 = 49+h^2

or, 625 = 49 + h^2

or, 625-49=h^2

or, √576 =h

h=24

Therefore vertical height (h)= 24m

Again,

Volume of square pyramid (v) = 1/3 L^2h

or, v =( 1/3) 14^2×24

or, v= 4704 / 3

Therefore, V= 1568 cubic meter.

how is eubacteria organized?

Answers

Eubacteria are prokaryotic cells(no nucleus). Body Structure: Eubacteria are single-celled organisms. Food: Eubacteria are both auto- and heterotrophic.

Explain how a carbon atom from a CO2 molecule in the air can end up as a carbon atom in a protein in a plant cell

Answers

Answer:

Photosynthesis and metabolism are among the most complex areas in biology so given the nature of this forum I've kept the answers simple and brief.

Carbon is of central importance to all biological systems due to its special bonding properties allowing it to form various bonds with other atoms and produce a wonderfully complex range of molecules used by life.

In photosynthesis inorganic carbon in carbon dioxide gas is fixed to hydrogen to produce sugar, an organic molecule. In this case the carbon gains electrons so it is 'reduced' and this process requires energy in the form of light. Once in sugar form, the process can be reversed and the carbon can be oxidised back into carbon dioxide during cellular respiration, releasing energy.

So in photosynthesis, the carbon from carbon dioxide is reduced to form a sugar molecule. When transitioning to respiration, the carbon in the sugar is oxidised to form carbon dioxide again in the reverse reaction to photosynthesis.

The carbon is transferred between molecules through various intermediate steps during these processes, involving enzymes (biological catalysts) to assist in cleaving specific bonds at each stage. During cellular respiration (an energy release reaction) as the carbon is successively oxidised electrons are liberated that are used as part of the energy release. These electrons are captured or 'carried' by special organic molecules called NAD and FAD (reducing them) which in turn can then be oxidised to produce the universal energy currency of life: ATP molecules. ATP is a small bio molecule containing a high energy phosphorous bond that can be broken to release energy to do cellular work. It is used by all life that we know of and is the ultimate product of cellular respiration.

When Photosynthesis and metabolism are among the most complex areas in biology Then given the nature of this forum. Carbon is of central importance to all biological systems due to its special bonding properties allowing it to form various bonds with other atoms and also, produce a wonderfully complex range of molecules used by life.

The carbon atom in a CO₂ molecule in the air can become a part of the

cellulose molecule in a plant by the carbon dioxide molecule reacting with the  water during photosynthesis to form Glucose.

This formula can use for the reaction: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

The glucose molecule formed is then translocated to other parts of the

     plants which are such as the roots and stems and help in the formation of cellulose.

Also, aThis is basically how the carbon atom in carbon dioxide becomes a cellulose  molecule.

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write the general characteristics of bryophytes?​

Answers

Explanation:

Vascular tissues are absent.

-Sex organs are multicellular and jacketed.

-Archegonium is flask shaped with tubular neck and a swollen venter. ...

-Sexual reproduction is of oogamous type. .

-The sporophyte of sporogonium is parasitic over the gametopphyte.

Answer:

Plants occur in damp and shaded areas.

The plant body is thallus like, i.e. prostrate or erect. It is attached to the substratum by rhizoids, which are unicellular or multicellular. They have a root-like, stem-like and leaf-like structure and lack true vegetative structure.

Can someone help me? :)

Answers

The answer is B. The reason is because in an RNA strand, A turns into U.

Help will give brainlest

Answers

Answer:

that would be an acid, its sulfuric acid

Answer:

C. Acid

Explanation:

What is the primary function of the immune system? [25 points]

Answers

Answer:

Explanation:

The primary function of the immune/lymphantic system is to fight off infections agents, such as viruses, bacteria, protozoa, or fungi, that enter your body  

Answer:

El sistema inmunitario es el sistema de defensa del cuerpo contra las infecciones. El sistema inmunitario, ataca a los gérmenes invasores y nos ayuda a mantenernos sanos.

Explanati

What are the spikes on my potatoes? I have had them on my counter for a min and it looks like they are turning into mutants

Answers

prob potato spores! cut them off

What is deposition?
1.The process by which water ice, wind or gravity moves fragments of rock and soil.
2.The process by which water, ice, wind or gravity deposit rock sediments and soil in a new place.
3.The breaking down of Earth's crust into smaller and smaller pieces.​

Answers

It’s a scam don’t click the link you’ll get a virus
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