BIOLOGY HIGH SCHOOL

At a basic level mitosis and meiosis are similar processes. However, they have very different outcomes. Which of the following statements describes an important outcome difference?A. Sister chromatids are separated in meiosis but not in mitosis.B. Sister chromatids are separated in mitosis but not in meiosis.C. Homologous chromosomes are separated in meiosis but not in mitosis.D. Homologous chromosomes are separated in mitosis but not in meiosis.E. None of the above describes a difference between mitosis and meiosis.

Answers

Answer 1
Answer:

Answer: C. Homologous chromosomes are separated in meiosis but not in mitosis.

Explanation: There are two main types of division that take place in eukaryotic cells, mitosis, and meiosis. Mitosis is the type of division that is used for growth, repair, and replacement of tissues. Therefore it is not necessary that the cells have  different chromosome numbers or are varied genetically in the daughter cells in the case of mitosis.

Meiosis is the division that takes place to form the gametes for sexual reproduction. It is important in the first stages of meiosis I, to introduce variation and to halve the chromosome number.

Chromosomes numbers are halved (from 46 to 23) during meiosis I because the gametes (sperm and egg) come together and fuse during fertilization to form a zygote. When this fusion occurs (23 from the zygote and 23 from the egg), the chromosome number needs to be returned to that of the parent cell (46).

Genetic variation is introduced during synapsis which only occurs in meiosis, not mitosis. Homologs exchange genetic information during crossing over of synapsis. Entire chromosomes also separate during meiosis I.

At the end of meiosis, four genetically unique cells are  produced with half the number of chromosomes as the parent cell (23 cromosomes) . After the process of mitosis is completed, two cells genetically identical to each pther are produced and have the same number of chromosomes as the parent cell (46 cromosomes).

Genetic variation is actually important because of changing environmental conditions.

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1.)Plants exhibit different types of responses to events that occur in the environment. Which of the following is an example of a nastic response?a. roots growing downward
b. vine tendrils growing around a fence
c. a Venus Flytrap snapping shut in response to touch
d. a house plant growing toward a window 2.)Gibberellins cause plant growth by stimulating ____________________.
a. mitosis
c. the storage of starch
b. cell elongation
d. photosynthesis

Answers

Vine tendrils growing around a fence is an example of nastic response. The correct option among all the options that are given in the question is the second option or option "b".

Gibberellins cause plant growth stimulating cell elongation. The correct option among all the options that are given in the question is option "b".

Which is most likely the result of genetic engineering?

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Genetic engineering is the process of manually adding new DNA or genetic material to an organism. The latest example of genetic engineering is immunotherapy. Healthy white blood cells are genetically modified to target a specific type of cancer.  These modified cells are then injected into a person with this specific type of cancer. These cells then target the cancer cells and destroy them. This immunotherapy is more advanced than Chemotherapy as it only targets the rogue cells, not all the cells. 

which of the following is a method used to obtain the absolute age of a rock or fossil? A.) Original horizontality B.) Radiometric dating C.) Superposition D.) Unconformities

Answers

Answer:

B.) Radiometric dating

Explanation:

Radiometric daiting is the ONLY answer to find the ABSOLUTE (not relative) age of a rock or fossil.

Hair would be dry and brittle without the presence of? A) sebaceous glands B) keratin C) melanin D) fat

Answers

Answer:

A) sebaceous glands

Explanation:

Sebaceous glands are responsible for producing and secreting sebum, a substance that can lubricate and waterproof the skin and hair, giving them a brighter appearance.

However, a highproduction of sebum through these glands can cause exaggerated greasiness in the hair as well as acne on the skin.

Meanwhile, low sebum production can leave the skin dull and dehydrated, causing premature aging, and leaving hair dry and brittle due to lack of lubrication.

Actually keratin is not correct

The correct answer to your question is

Sebaceous Glands.

The renal corpuscle is made up of ________.A. Bowman's capsule and glomerulus
B. the descending loop of Henle
C. the renal pyramid
D. the renal papilla

Answers

The renal corpuscle is made up of Bowman's capsule and glomerulus. 

The renal corpuscle is made up of Bowman's capsule and glomerulus, hence option A is correct.

The renal corpuscle is made up of Bowman's capsule and the glomerulus. The kidney has a conical structure called the renal pyramid. Per kidney, there are 10–18 renal pyramids. A component of the tubule part is the Henle loop.

The filtration unit of vertebrate nephrons, commonly known as the malpighian body, is the renal corpuscle, a functional component of the kidney.

It is made up of a glomerulus, which is a group of capillaries, and a Bowman's capsule, which has two walls and opens into a tubule.

Learn more about renal corpuscle, here:

brainly.com/question/13962285

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True or false Earth’s crust sits on top of the mantle.

Answers

true. Earth has four layers which is the crust, mantle,outer and inner core.
1. Atmosphere
2.Oceans
3.Crust
4.Mantle
5.Core
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