What is active transport

Answers

Answer 1
Answer: The movement of ions or molecules across a cell... requiring Energy.
Answer 2
Answer: Active transport is the movement of molecules across a cell membrane.

Related Questions

The process by which glucose is converted into starch is know as?
A student has a toy car that is green, made of iron(metal)and weighs 52 grams. If the student drops the car in a grassy field, how could the student find his toy car?A.Use a magnifier lens to find the car by its color.B.Place a sample of the field in water to find out its density.C.Weight samples of the area to find a sample that is 52g.D.Place a magnet over the area to attract the car.
Describe the conservation of mass in a food web
Which of the following are not properties of carbon?.It's very cohesive and adhesive. .It can form polymers like carbohydrates, lipids, proteins, and nucleic acids. .It can regulate temperature. .Decomposition of molecules can occur readily, releasing needed energy.
After mitosis each identical daughter cell has a complete set of what? Is it chromosomes or organelles ?

Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.occurs in
organisms that
sexually reproduce

occurs during
growth and
development

the DNA is
replicated

occurs in
all organisms

the number of
chromosomes
remains the same

the number of
chromosomes
reduces by half

Answers

Occurs in  organisms that  sexually reproduce ==> Occurs in meosis.

Meiosis is a type of gamete-specific nuclear division.

Meiosis occurs during spermatogenesis and oogenesis (egg formation in women).

In order for the number of chromosomes, characteristic of the species, to be conserved, it is necessary that before the encounter, the number of chromosomes of each of the reproductive cells be divided by two.

The reduction in the number of chromosomes takes place during the phenomenon called "meiosis".


Occurs during  growth and  development ==> It concerns mitosis.

Mitosis will ensure the good fulfillment of several phenomena:

. embryonic development,

. the general growth of organisms from birth to adult size,

. continued growth of certain organisms and / or organs; for example, trees, hair, teeth in ruminants, nails, ...


The DNA is  replicated ==> concern both mitosis and meiosis.

The cell cycle of eukaryotic cells is as follows:

• Interphase (normal functions, DNA replication)

G1 - growth / cellular activity

S - DNA synthesis / replication

G2 - preparation for division

• Phase M (cell division): which consists of either mitosis or meiosis, depending on cell types.

• Cytocinesis (cytoplasmic division).

So whether it is mitosis or meiosis, both are preceded by a replication of the genetic material (DNA)


Occurs in  all organisms ==> concern both mitosis and meiosis.

An organism is a set of elements that make up a functional structure.

In biology, the term organism designates a living being as it is organized, that is to say composed of different organs or organelles forming a coherent whole (as opposed to micro-organisms).

All multicellular organisms have sexual reproduction, so their cells are systematically mitosis and meiosis.

We exclude microorganisms of which a very small part of them have asexual reproduction.


The number of  chromosomes  remains the same : concerns only mitosis.

During mitosis, the human cell has 2n monochromatid chromosomes. In phase S consists of a doubling of the amount of DNA indeed, and the cells then have 2n chromosomes bichromatidiens. In the metaphase of mitosis, the chromosomes of the mother cell are arranged on a "metaphase plate", then split in 2-chromosomes, but monochromatids, during anaphase. Each daughter cell therefore has 2n monochromatid chromosomes.



The number of  chromosomes  reduces by half ==> Concerns only meiosis

Meiosis unfolds in two stages:

* The first meiotic division is called reductional because it allows to pass from 2n double chromosomes to n double chromosomes.

* The second is called equational because it preserves the number of chromosomes: one passes from n double chromosomes to n simple chromosomes.

Meiosis thus allows the formation of 4 haploid daughter cells (or gametes).

In humans, a normal cell contains 2n = 46 chromosomes (thus 23 pairs) while a gamete contains n = 23 chromosomes in two divisions).

Final answer:

Both mitosis and meiosis occur in organisms that sexually reproduce, and in these processes, the DNA is replicated. Mitosis is specific to growth and maintaining the same number of chromosomes as in the parent cell. Meiosis is characterized by the reduction of chromosomes by half.

Explanation:

The given descriptions can be associated in the following manners:

 

  • "Occurs in organisms that sexually reproduce" - This is true for both mitosis and meiosis.
  • "Occurs during growth and development" - This is closely related to mitosis as it is a process for growth and repair in almost all organisms.
  • "The DNA is replicated" - This process happens in both mitosis and meiosis.
  • "Occurs in all organisms" - This also is true for both, as mitosis happens in prokaryotic and eukaryotic cells and meiosis is prevalent in sexually reproducing organisms.
  • "The number of chromosomes remains the same" - This is specific to mitosis, where the daughter cells have the same number of chromosomes as the parent cell.
  • "The number of chromosomes reduces by half" - This is a characteristic of meiosis, as it produces sex cells (gametes) with half the original number of chromosomes.

Learn more about Mitosis and Meiosis here:

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Molecules of what are released off the pyruvic acid?

Answers

Answer:

Carbon Dioxide and NADH

Explanation:

Coenzyme-A and NAD+ act on the Pyruvic acid and release Carbon Dioxide and NADH. And convert pyruvic acid to Acetyl CoA. Then Acetyl CoA further uses in the citric acid cycle.

10. What happens to atmospheric pressure as a person rises in altitude?O A. It decreases
O B. It's unaffected by changes in altitude,
O C. It increases
OD. It changes based on the time of year.
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Answers

Answer: A: Decreases

Explanation: The pressure is the ratio of the weight of the air to unit area. So, as the height increases, the pressure decreases.

The answer is a as it decreases when someone rises in altitude

Which layer of the earth is where weather occurs

Answers


It's the troposphere if I remember correctly. :)
hi if it help plz pick as best tnx
ok so .....
Weather does not occur in any of the earth's layers. 

Weather occurs in the lowest layer of the earth's atmosphere which is called the troposphere

Which parenting behavior does not increase the probability that offspring will survive?Choose the correct answer.


A) producing milk to feed young

B) guarding young from predators

C) protecting young from cold weather

D) abandoning young before eggs are hatched

Answers

Answer:

The answer is D. abandoning young before eggs are hatched.

Explanation:

The answer is D because all of the others are helping the young out and the last one isn’t

Organisms that can interbreed and produce offspring that can grow to produce young are of the same __________.

Answers

The answer is specie.