why are Polar bears are much larger than American black bears

Answers

Answer 1
This is because of natural selection; since polar bears live in a rough environment, natural selection gives them more fur, more muscle, and can go longer without food

Related Questions

what is meaning of reclusive???​

Answers

Answer:

The meaning of reclusive is avoiding the company of other people, solitary.

hope it helps

Answer:

living a solitary life

Hindi m Akelapan

Identify the Levels of Organization in a Multicellular Organism

1: Cells

2: Organ System

3: Tissue

4: Organ

DONE!

Answers

Answer:

2 3 4. is the correct answer


Define taxonomic hierarchy....​

Answers

taxonomic rank is the relative level of a group of organism

Answer:

In biological classification, taxonomic rank is the relative level of a group of organisms in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, order, class, phylum, kingdom, domain, etc

Explanation:

What is taxonomic hierarchy?

“Taxonomic hierarchy is the process of arranging various organisms into successive levels of the biological classification either in a decreasing or an increasing order from kingdom to species and vice versa.” Each of this level of the hierarchy is called the taxonomic category or rank.

2. A nucleus contains tiny rod-shaped
boll bodies. What are they called?

Answers

A nucleus is something that idek what ur talking abt
the answer is nucleus

DNA and Rna are macromolecules made up of what?

Answers

Answer:

Nucleotides

Explanation:

"These macromolecules consist of a large number of linked nucleotides, each composed of a sugar, a phosphate, and a base."

Hope this helps:

DNA, RNA, and the Flow of Genetic Information

https://www.ncbi.nlm.nih.gov/books/NBK21171/

DNA and RNA are macromolecules made up of units called nucleotides.

What are nucleotides?A nucleotide is the most fundamental element of nucleic acids (RNA and DNA). A sugar molecule (ribose in RNA or deoxyribose in DNA) is bonded to a phosphate group and a nitrogen base to form a nucleotide. Adenine (A), cytosine (C), guanine (G), and thymine (T) are the bases that make up DNA. The base uracil (U) replaces for thymine in RNA. Long chains of nucleotides make up DNA and RNA molecules, which are polymers.

hence nucleic acids like DNA and RNA are made up of nucleotides

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Which statement about multi cellular organisms is correct

Answers

Answer:

don't know ???????????

Use your knowledge of Protein Synthesis, and the provided chart, to identify the
correct Amino Acid sequence from the mRNA strand: AGUUGGUCUGUA


A: serine, tryptophan, serine, valine
B: aspartic acid, valine, leucine, asparagine
C: leucine, histinde, glutamic acid, leucine
D: serine, threonine, arginine, aspartic acid

Answers

Answer:

A: serine, tryptophan, serine, valine

Explanation:

Hi there!

Protein Synthesis is the process where proteins are created from DNA.

We are given the mRNA strand AGUUGGUCUGUA, as well as a provided chart

The mRNA strand is created out of nucleotides (each of the letters is one nucleotide in the code), which will code for a specific chain of amino acids, creating a protein.

Each amino acid is made up of 3 nucleotides. This sequence of 3 nucleotides is called a codon.

So we can break up the code into groups of 3, to make identifying the codons easier.

AGU UGG UCU GUA

Now we need to figure out which amino acid each codon codes for. Thankfully, we were given a chart that can help us with that.

The chart is read where the first base is on the left, and is vertical. The second base is in the center, yet is horizontal. The third base is on the right, and is also vertical.

Let's start with the first codon, which is AGU

The first base is A. The second base is G, and the third base is U. So the first amino acid is serine (ser)

The second codon is UGG.

The first base is U, the second base is G, and the third base is G. So the second amino acid is tryptophan (trp)

The third codon is UCU

The first base is U, the second base is C, and the third base is U. So the third amino acid is serine (ser)

The fourth codon is GUA

The first base is G, the second base is U, and the third base is A. So the fourth amino acid is valine (val).

That means the amino acid sequence from the mRNA code is: serine, tryptophan, serine, valine. The answer is A

Hope this helps!

What would the independent variable be in an experiment testing the effectiveness different types of paper airplane?
A. The types of folds made
B. The paper used
C. The distance DI each plane’s flight
D. The color of the paper

Answers

Answer:

A. The type of folds made

Explanation:

independent varible is the one that changes to affect the outcome of the dependent variable

What happens to a population when it's larger than the available resources can accommodate?


1. The organisms not well suited for that environment won't survive.


2. The organisms who need fewer nutrients will support the organisms who need more.


3. The environment will produce more nutrients and resources to support the population.


4. All of the organisms in that population will die.

Answers

Answer:

The organisms not well suited for that environment won't survive

Explanation:

Good Luck!

Answer:

The organisms not well suited for that environment won't survive.

Explanation:

its the right answer  for HS

Glands secrete different types of ___________ directly into the bloodstream.
10 points
hormones
neurons
signals
enzymes

Answers

I think the answer is hormones

what statements are true about the biological macromolecules?
A. All biomolecules could be called carbon - based molecules
B. The monomers of DNA are nucleotides
C. Ready cellular energy comes in the form of lipids
D. Carbohydrates contain nitrogen and therefore differ from other macromolecules
E. Cell membranes are made, in part, from phospholipids
F. The monomers of starch are monosaccharides

Answers

Answers:

A. All biomolecules could be called carbon based molecules

B. The monomers of DNA are nucleotides

E. Cells membranes are made, in part, from phospholipids

F. The monomers if starch are monosaccharides

All biological macromolecules are carbon-based molecules, the monomers of DNA are nucleotides, cell membranes, in part, are made from phospholipids and the monomers of starch are monosaccharides correct statements. Therefore, the correct options are A, B, E and F.

What are biological macromolecules?

Biological macromolecules are large molecules constituted of organic molecules. These are necessary for the survival of an organism. The four major classes of macromolecules in the study are Carbohydrates, Lipids, Proteins and Nucleic acids.

They are all built from carbon-based or organic molecules. These molecules form important components of a living cell and constitute most of its dry weight. These macromolecules are mostly obtained from the food we eat which is broken down into nutrients which are these organic molecules.

They are also called biomolecules. Carbohydrates are energy sources made of sugars. They are broken down into glucose which is required for cellular respiration to produce energy.

Proteins perform various functions including structural, regulatory, protective etc. Lipids are non-polar compounds that store energy for the long term in the form of fats in our bodies. Nucleic acids are hereditary biomolecules that pass on traits from one generation to another.

Therefore, the correct options are A, B, E and F.

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What is the average for the following set of measurements?
27°C, 12°C, 31°C, 19°C, 23°C, 11°C, 17°C O A. 20°C B. 14000 C. 7°C O D. 28°C​

Answers

Answer:

A. 20°C

Explanation:

If you add 27,12,31,19,23,11, and 17 altogether, it's 140. 140 divided by 7 is 20. So, 20 is the average.

Which of the following types of compounds is unlike the other three?
A wax
B saturated fat
C phospholipid
D polysaccharide

Answers

D. Wax, saturated fat and phospholipids are all kinds of fats a polysaccharide is a sugar or carb.

Our solar system is just a small part of the Milky Way galaxy, which is just a tiny part of the universe.

true or false

why?​

Answers

Answer:

True

Explanation:

Our solar system is just a small part of the milky way galaxy. Our galaxy is a huge collection of gas, dust, and billions of stars and their solar systems and there are many galaxies in the universe. This is because of the big bang.

When it happened, many galaxies were formed and then in these galaxies many solar systems developed.

Hope this helps.

4 Which muscles are actively involved in normal breathing?

Answers

The lungs have no skeletal muscles of their own. The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles.

Answer:

The main muscles are the diaphragm and intercostal muscles, but the muscles in the neck and the abdominal muscles also help.

Explanation:

The diaphragm is the muscle under the lungs that helps move the lungs while the intercostal muscles are the muscles in between the ribs.

A steel bar has a mass of 80 kilograms and a density of 8,000 kilograms per cubic meter.
Calculate its volume.

Write your answer to the hundredths place.

Answers

Volume = Mass/density = 80/8000= 0.01 M³

What are the homeostatic pressures an axolotl goes through and how do
they deal with that?

Answers

Here is a link to understand the whole concept, of the homeostatic pressures on axolotl: https://www.sciencedirect.com/science/article/pii/S0301008217302113

if your leg was to get cut off where would you feel the pain?

Answers

The thigh area will feel much more pain as when leg is cut off , all nerves are together in thighs, so more pain will be there.

Hope it helps you... pls mark brainliest if it helped you

Answer:

The nerve(s) in your leg.

Explanation:

It's not your leg that will hurt but the nerve in your leg. So wherever the leg is cut, the nerves will have to be cut as well, but also after one of your limbs is amputated, you may feel like the limb is still there. That's called phantom sensation. You might feel pain in your limb even though it is physically not there.

Please help I will make brain list ​

Answers

Answer:

light reflection

Explanation:

often seen by sunlight to windows

the answer is reflection.
why:
-refraction is going through a liquid or substance and bending light wheareas reflection bounces the light back off

URGENTTT!!
how insulin taken by breathing it in enters the blood?

Answers

Answer:

well when you breathe in the insulin it travels to your lung and is absorbed by the alveoli where it is dissolved and is transffered to the capillaries

Explanation:

The optic nerves pass through the ----- of the ------- bone.

Answers

Answer:

sphenoid bone

Explanation:

Extracranial. The optic nerve is formed by the convergence of axons from the retinal ganglion cells. These cells in turn receive impulses from the photoreceptors of the eye (the rods and cones). After its formation, the nerve leaves the bony orbit via the optic canal, a passageway through the sphenoid bone.

Which of the following best explains why Mars' and Venus' surface temperatures vary, despite both planets having atmospheres that contain mostly carbon dioxide?(1 point)

Venus has a surface of high mountains which absorb heat.
Mars has a surface of red rocks and sand which reflect heat.
Venus has a thick atmosphere which blocks heat from the surface.
Mars has a thin atmosphere that cannot hold much heat.

Answers

Mars and Venus are the planets of the solar system and vary in their temperatures. Mars has a thin atmosphere that cannot much amount of heat. Thus, option D is correct.

What is the atmosphere of Mars?

Mars has been the fourth planet of the solar system that is also called the red planet due to its red appearance. It has more amount of carbon dioxide than oxygen gas. It comprises various gases and has a thin atmosphere.

The thin atmosphere of Mars unlike Venus cannot hold the heat and transmits it back to space. Venus has a thick atmosphere that traps heat and results in an increased surface temperature. The atmospheric particle of Mars cannot retain heat and hence vary in temperature.

Therefore, option D. Mars has a lower temperature than Venus due to its thin atmosphere.

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Answer:

Mars has a thin atmosphere that cannot hold much heat.

Explanation:

bc science

Your hand pop up after touching a hot stovetop. Which two organs systems are most responsible for your reaction?
A. nervous and respiratory
B. immune and muscular
C. nervous and muscular
D. circulatory and muscular

Answers

Answer:

nervous and muscular

nervous and muscular

Define Histology
will give BRAINLEIST

Answers

Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures visible without a microscope

whould the prarie be considered an open or closed ecosystem? why?​

Answers

The plain is an open ecosystem due to it is vulnerable and may be destroyed

Prophage refers to: (please give right answer only)​

Answers

Answer:

: an intracellular form of a bacteriophage in which it is harmless to the host, is usually integrated into the hereditary material of the host, and reproduces when the host does.

can someone plz help me

Answers

Answer:

3

Explanation:

bc that is the cell wall, which only plants have

- Which cell structures are similar in the way they protect, support, and hold the other
organelles together?
A. Cell Wall, cytoplasm, and lysosomes
B. Cell membrane, cytoplasm, and ribosomes

Answers

Answer:

A

Explanation:

cell wall - protection against mechanical

cytoplasm - provide a platform which organelle can operate within the cell

lysosomes - helps cells to self destruct

6. The plant tissue that carries sugar from the
leaves to the roots is the

Answers

Answer:

phloem

Explanation:

I am pretty sure that this is right and the xylem carries the water. I hope this helps!! I am sorry if it is worked wrong.

what are the elements required for photosynthesis what are the products​

Answers

AnswerPhotosynthesis involves three elements: carbon, hydrogen, and oxygen. You have seen that the products of photosynthesis are oxygen and glucose.

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