Biology College

can someone answer it! ​

Can Someone Answer It!

Answers

Answer 1
The answer is because: What is meant by Na+ channel inactivation? The Na+ channel no longer allows Na+ ions to pass through it. What happens when voltage-gated K+ channels open? ... minimum voltage needed to generate an action potential.

Related Questions

Which choice would have the smallest impact on climate change when purchasing apples at the store?

Answers

Answer: Varies

Explanation:

Something that comes to mind would be if a customer buyed a plastic bag after purchasing the apples.

Which of the following examples best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem?
Choose 1 answer:
Choose 1 answer:

(Choice A)
A
A frost in late spring kills some of the earliest budding plants and flowers in a field.

(Choice B)
B
Tens of thousands of geese rest for a week at a large lake during their annual migration.

(Choice C)
C
The failure of a 60-year-old beaver dam floods a downstream meadow.

Answers

i would say C. resting isnt really going to change anything, they are still migrating and only SOME of the budding plants were killed not all.

The failure of a 60-year-old beaver dam floods a downstream meadow  best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem

It cause immense damage to the property, habitats due to water flooding over them.

What is a dam?A dam is a barrier that stops or restrict the flow of surface water or underground streams.It is build across the stream or river to hold water back.It can used to store water, control floods and generate electricity.

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give difference Himalaya rivers- Peninsula river?​

Answers

Answer:

- Himalayan rivers get water from snow and rain,

-whereas Peninsular rivers are fed by rain only.

-Himalayan Region is the shape of an arc.

- The Peninsular Plateau is in the shape of a triangle.

-Himalayan Region is made up of sedimentary rocks

- The Peninsular Plateau is made up of metamorphic and igneous rocks.

There is a strong relationship between organism complexity and genome size in eukaryotes. Select one: True False

Answers

The statement 'There is a strong relationship between organism complexity and genome size in eukaryotes' is FALSE. The genome of an organism is all genetic information of that individual.

The genome is represented by all nucleotide (DNA) sequences that form the genetic makeup of an organism.

The genome is composed of protein-coding genes and non-coding sequences, which often exhibit regulatory functions.

The proportion between protein-coding sequence and non-coding sequence is not linear, thereby the complexity (i.e., the amount of different types of proteins encoded by the genome) and genome size in eukaryotes is variable among species.

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What is special about each organism in the ecosystem

Answers

Here the answer ⬇️⬇️ thanks me later


Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statement into the correct box. some statements may apply to more than one type of microscopes. Some statements may not be used.

Answers

Answer: Light microscope:

use a beam of light to produce magnified images

can be used to examine living cells and tissues

Scanning electron microscope:

use a beam of electrons to produce magnified images

can be used to examine DNA

can be used to examine cells

Transmission electron microscope:

use a beam of electrons to produce magnified images

can be used to examine DNA

can be used to examine cells

Explanation: Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.

Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:

1. Scanning electron microscope(SEM): an electron beam passes over the specimen's surface and displaces electrons which are then focused on  a screen to form an image. Images appear in 3-D

2. Transmission electron microscope: electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D

L 3.2.2 Quiz: Matter and Energy
Question 5 of 10
Which substance is an example of organic matter?
A. Carbon dioxide
B. Oxygen
C. Salt
O
D. Sugar

Answers

Answer:

D

Explanation:

An example of organic matter is sugar

D is the correct answer. Sugar is an example of Organic matter.

Carbon dioxide is inorganic. Oxygen is neither while salt is inorganic.

What aspect of a muscle cell
allows movement in the body?
A. its shape is short and blunt
B. fibers within the cell move back and forth
allowing the cell to stretch and shrink
C. there are no organelles which allows it to
move easier

Answers

Answer:

B

Explanation:

Nearly all movement in the body is the result of muscle contraction.

Question 1: One of the central themes in biology is how DNA, RNA, and proteins are related. Describe how genetic information flows between those types of molecules. Include the results of the processes of transcription and translation? ( Will Mark Brainliest if answered correctly. Do Not Repost Someone Else's Answer that is already on Brainly or any other websites please). ​

Answers

Answer:

it flows by the centeral dogma

Answer:

Explanation:

DNA →RNA→ Protein

in the nucleus protein synthesis is copied from DNA onto mRNA thru transcription

messenger mRNA leaves nucleus & goes to  cytoplasm attaching to ribosome.  

tRNA (transfer RNA)  decodes & translate info on the attached mRNA via translation &

gets amino acids corresponding to this information from the pool of free amino acids in the cytoplasm, and brings them to the ribosome where they are joined together into a chain and thus the protein is formed

What is the most likely mode of inheritance? Which individuals from the pedigree exclude other models of inheritance?
PLZ HELP

Answers

Answer:

The modes of inheritance are autosomal dominant , autosomal recessive, and X-linked. To simplify the discussion of these different forms, the trait used in the following text will be a hereditary disease.

Brainliest plz

Crossing-over occurs in prophase of mitosis and meiosis.
True
False

Answers

It is True crossing over occurs in prophase of mitosis and meiosis

Gametes are ______ They have ______ the number of chromosomes.


1) diploid; double the number of
chromosomes.

2) diploid; half the number of chromosomes.

3) haploid; double half the number of chromosomes.

4) haploid; half the number of chromosomes.

Answers

Answer:

4. haploid half the number of chromosomes

Which of the following is the reason
that viruses aren't considered alive?
A. they can grow and develop on their own
B. they can metabolize
C. they can't reproduce on their own
D. they can't move on their own

Answers

Answer:

they can't reproduce

Explanation:

Viruses rely on the cells of other organisms to survive and reproduce, because they can't capture or store energy themselves. In other words they cannot function outside a host organism, which is why they are often regarded as non living thing

The answers are


A: Cholesterol


B:

Integral protein


C: Glycolipid


D: Glycoprotein

Answers

Answer:

sis /  bro

whats the question pls type in the comment of mine and i will say the answer

which of the following can cause polyploidy
A : a single egg fertilized by two sperm
B: a diploid egg being fertilized by a normal sperm
C: a normal egg being fertilized by a diploid sperm
D : all of the above ​

Answers

Explanation:

a polypiody is a condition that has more than 2 sets of chromosomes. common in plants..

As a cell becomes smaller, it’s surface area-to-volume ratio…

Answers

Answer:

DECREASES

Explanation:

The answer here is going to be Decreases

Precipitation moving from higher to lower elevations on the ground is called___?

Answers

Answer:

Evaporation

Explanation:

Evaporation is the process in which percipitation moves higher to lower elavations on the ground. Evaporation is when the sun heats up and dries out the water causing it to rise up to the clouds which then causes rain for another time. ( I am not completely sure)

The processes by which a molecule can be extracted and processes by which a molecule can be isolated

Answers

Answer:

Extraction is the first step to separate the desired natural products from the raw materials.

solvent extraction, distillation method, pressing and sublimation

Isolation can be achieved from polyherbal formulation but it will be rather difficult and would involve complex purification steps .

Explanation:

Have a great day!

can someone tell me what is the right one please I beg u

Answers

Answer:

Active Ingredients

Explanation:

I think this because drugs have different active ingredients which make it a drug and some drugs can be used for theraputic reasons.

Help!!
How did reduced methane concentrations in the atmosphere affect Earth?
Earth warmed.
Earth cooled.
Volcanic activity decreased.
Volcanic activity increased.

Answers

Answer:

Earth cooled

Explanation:

Here are all the answers for that quick check:

1. Which option orders the events chronologically, from earliest to latest.

Answer: Single-celled organisms increase atmospheric methane concentrations. Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve.

2. Which forms of life were dominant in the Mesozoic era?

Answer: Reptiles

3. How did the success of photosynthetic bacteria change Earth’s atmosphere?

Answer: increased oxygen concentration

4. How did reduced methane concentrations in the atmosphere affect Earth?

Answer: Earth cooled.  

5. Which characteristic defines the Paleozoic era?

Answer: Animals with shells and hard parts were dominant for the first time.

You're welcome.

Answer:

Earth cooled.

Explanation:

The reduced methane concentrations in the atmosphere affect Earth :

Particles of gas and dust released into the atmosphere during a volcanic eruption affect the climate. Most of the particles emitted by the  volcano cool the planet by blocking incoming solar radiation. The cooling effect can last from months to years, depending on the nature of the eruption.

Therefore, the Earth is cooled.

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Scientists are uncertain about the reasons for the dodo’s extinction.
Suggest an explanation for this uncertainty.

Answers

There were few records kept about the dodo birds.

What is sun ? Pls answer me

Answers

The Sun is a star. It is a huge, spinning, glowing sphere of hot gas. The Sun is just like the stars that you see in the night sky. ... The Sun is the center of our Solar System and contains most of the mass in the Solar System. All of the planets in our Solar System, including Earth, orbit around the Sun.

Answer: The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light and infrared radiation.

Explanation:

In respiratory system, most of the dirt/ microbes in the air are trapped by

Answers

Answer:

Cilia propel a liquid layer of mucus that covers the airways. The mucus layer traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.

If a DNA molecule had a total of 1000 nucleotides and 200 of these are adenines, what would be the total number of pyrimidines in this molecule?

Answers

If a DNA molecule had a total of 1000 nucleotides and 200 of these are adenines, then the total number of pyrimidines is 500. Adenines (A) are purine bases.

DNA is a double helix molecule composed of two long chains of nucleotides that are held together by hydrogen bonds.

In DNA, there are four types of nucleotides, each containing one different nitrogenous base: Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).

Adenine (A) and guanine (G) are purines, whereas cytosine (C), thymine (T), are pyrimidines.

According to the base pair rules, Adenine always pairs with Thymine, whereas Guanine pairs with Cytosine.

In this case, the number of A + T is equal to 400 (200 + 200) and the number of G + C is 600 (300 + 300), thereby the number of pyrimidines or C + T is equal to 500 (200 + 300).

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What do all living things have in common? All have cells with a nucleus. All have a genetic code. All are made of two or more cells. All can perform photosynthesis.

Answers

Living beings are organisms that can respire, respond, grow, reproduce, and are made of cells. All living things have a genetic code. Thus, option B is correct.

What is a genetic code?

A genetic code is a sequence of proteins and nucleic acids that act as a hereditary molecule that transfers the traits and characteristics to the progeny.

The code can be in the form of DNA or RNA and provides information about the genotype of the organisms that were passed from their ancestors.

The genetic code is in the form of triplets and is a universal system that codes for the same proteins in all organisms. It consists of the nitrogenous bases that through translation make the amino acids.

Therefore, option B. all living organisms have a genetic code.

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What is Chlorophyll and why do plants need it?

Answers

Answer:

The role of chlorophyll in photosynthesis is vital.

Chrolophyll, which resides in the chloroplast of plants, it is the pigment that gives plants their green color, and it helps plants to create their own food through photosynthesis.

-TheUnknownScientist 72

why do biomes differ

Answers

Answer:

Biomes differ in the amount of precipitation they receive, their temperatures, and the life that inhabits each biome.

Explanation:

Biomes differ in the amount of precipitation they receive, their temperatures, and the life that inhabits each biome.

For example, the types of organisms found in the subtropical desert differ drastically from the organisms found in a tropical rainforest. Each organism is well-adapted to its environment, and a subtropical desert and tropical rainforest are two very different biomes.

If you look at the graph below, you can see that the tropical rainforest has high average temperatures and high precipitation, whereas subtropical deserts have much lower precipitation and great variation in average temperature.

Explanation:

What is the genetic makeup of offspring resulting from mitosis?

A. They are genetically identical to the parent cell.
B. They have half as many chromosomes as the parent cell.
C. They have twice as many chromosomes as the parent cell.
D. They share half their genes in common with both parents.

Answers

A. That good answer

Answer:

Mitosis means the offspring is identical! So answer is A!

write the two importance of cilia in ciliated protozoan​

Answers

Explanation:

They are primarily responsible for locomotion, either of the cell itself or of fluids on the cell surface. They are also involved in mechanoreception. There is even a class of microorganisms named for these small structures. Ciliates are protozoans that possess cilia which they use for both locomotion and feeding.

Which color reflects heat radiation the best? Red

Blue

White

Answers

Answer:

White

Explanation:

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