Can someone describe the process of meiosis?

Answers

Answer 1

Answer: Meiosis is the process by which a cell divides in preparation for sexual reproduction.

Meiosis has 2 phases - Meiosis I and Meiosis II. Both are similar to mitosis, the process of a cell dividing for asexual reproduction.In Meiosis I, there are 5 sub-phases: Prophase I, Metaphase I, Anaphase I, Telophase I, and Cytokinesis.
Here's a quick overview of each sub-phase:

MEIOSIS I
· Prophase I: Chromosomes form from the DNA in the nucleus and the nuclear membrane dissolves, letting the chromosomes into the cytoplasm. This is when crossing-over occurs.

Metaphase I: Spindle fibers attach to the chromosomes and the homologous chromosomes pair up in the center of the cell.

· Anaphase I: Spindle fibers begin to shrink and pull the pairs apart, towards the opposite poles of the cell.

·Telophase I: The spindles break down and nuclear membranes form around each of the two groups of chromosomes.

·Cytokinesis: The cell divides in the middle, splitting the cytoplasm and forming two new cells. These cells each have a full set of chromosomes.

MEIOSIS II
·Prophase II: The nuclear membrane of each of the two cells formed in Meiosis I break down.

·Metaphase II: Spindle fibers form and line up the sister chromatids in the middle of each cell.

·Anaphase II: Spindle fibers begin to shrink and pull sister chromatids apart, towards the opposite poled of the cell.

·Telophase II: The spindles break down and new nuclear membranes form.

·Cytokinesis: The cytoplasm splits and two new cells are formed. These cells are haploid, meaning they only have half a set of chromosomes.

Whew. Hope that helps! :)

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The coast of California on the western side of the state has a moist climate, while the eastern side is a desert. What could cause this difference? A. Cool winds cannot blow across a large lake into the desert. B. Mountains prevent moist air from blowing over into the desert. C. The west side is closer to the equator than the east. D. California has experienced a drastic climate change in the past few years.

Answers

The answer is b i believe

Answer:

The answer is B. Hope this helps ;)

Explanation:

Minerals must be _____. liquids organic homogeneous rocks

Answers

The correct answer is homogenous. Minerals must be homogenous. Minerals are these compounds that are natural occurring in the form of solid and inorganic and can also be in a crystal structure. Minerals are identical which is why they are homogenous.

Answer:

The correct answer is homogenous

Explanation:

A biome is defined by it

Answers

Biomes are typically defined by their climate and dominant vegetation, including grassland, tundra, desert, tropical rainforest, and deciduous and coniferous forests.

Which would be an example of a secondary consumer?A. a rabbit
B. a fox
C. a cow
D. a mouse

Answers

Answer:

B. a fox

Explanation:

A secondary consumer is those that, to produce energy, consume primary consumers. Those are always herbivores or organisms that only eat autotrophic plants.

In this case, a rabbit and a cow are primary consumers.

The mouse is herbivores too.

The only option left is Fox.

Foxes eat other animals, they are carnivorous. This made the fox a secondary consumer.

B.a fox is a good example of a secondary consumer.

♡♡Hope I helped!!! :)♡♡

How many circles, each with a 4-inch radius, can be cut from a rectangular sheet ofpaper, measuring 16 inches x 24 inches?
(A) 6
(B) 7
(C) 8
(D) 12
(E) 24

Answers

A)6
the radius is mentioned at four, meaning the length is 8
16/8=2
24/8=3
2*3=6

Let us find the area of circle first

Area of circle = pi x r x r

= 3.14 x 4 x 4
= 50.24

Area of Rectangular sheet = 16 x 24
= 384

Thus, no. of circles = area of recatngle / area of circle

= 384 / 50.24

= 4.64

Thus, the answer is (A) , because it is the nearest.

Which two factors have combined to create the Hawaiian island chain?A. seafloor spreading and uplift
B. plate motion and hot spot volcanism
C. abyssal tectonics and plate separation
D. hydrothermal venting and changes in sea level

Answers

The answer would be b

B. plate motion and hot spot volcanism

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