Explain how sexual reproduction and the process of meiosis result in genetic variation.

Explanation:

sexual reproduction is the process of fusion of male gamete and female gamete producing a genetically different offspring .Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. meiosis leads to variation by forming new combination of alleles from maternal and parental chromosome  

(choose which answers suits the question )

Explanation:

Meiosis leads to the formation of gametes which have half the number of chromosomes in the somatic body cells. This means two gametes should fuse together for a new individual to form. The two gametes coming from two different parents carry features from two individuals, and this is the first source of variation.

The process of independent assortment happens during metaphase I where the chromosomes from both parents align on the equator of the cell in an independent way, meaning some from each parent on one side, and the opposite on the other. This means the gamete formed has a mixture of chromosomes from the parent's parents, and this is the second source of variation.  

Finally there is the crossing over which happens also in metaphase I where genetic material between the homologous chromosomes is exchanged. This means not the whole parental chromosome goes to one cell, but rather a mixture of both the paternal and the maternal in this one chromosome go to one cell, and an opposite mixture goes to the other. And this is the third source of variation.

Present-day India is in South Asia, at the northern end of the Indian Ocean. What evidence found in India matches that of other locations?

can someone please help me asap?

Observing Animals

Let’s study and compare three animals: a frog, an ancient and extinct mammal-like animal, and an owl. Observe the illustrations, and then answer the questions.

1. How are the bodies of the three animals similar to one another?

screenshot
screenshot
screenshot

I'll give brainliest to the person who gets it right with an explanation!
Which of the following is NOT a true statement about herbivores, carnivores, or decomposers?
Herbivores eat plants.
Omnivores eat other animals and dead organisms.
Decomposers break down dead organisms to release matter back into the environment.
Carnivores eat other animals.

Which of these statements BEST describes rocks ?


A. Rocks may contain one or more minerals

B. Rocks are made inside the Earth's mantle


HELP ASAP

C. Just like minerals, rocks have a definite shape

D. Rocks and minerals have a definite chemical composition

please help me answer this question

How do seasons compare in the northern and southern hemispheres?

Henry visits his aunt's house on Jacksonville Beach several times a year. He notices how much sand is between the ocean and the seawall in June. During July, there is a hurricane. In September, Henry notices that there is much less sand between the ocean and the seawall. What is the best explanation as to what happened to the sand?

A.
The wind from the hurricane destroyed the sand.

B.
The heavy rains from the hurricane packed the sand down.

C.
The hurricane created giant waves that washed away the sand.

D.
The hurricane damaged the sea wall, and the sand behind it washed away.

The graph shows a population of green and brown beetles in a grassy area.



Over time, more of the brown beetles avoided predators and lived to reproduce. What environmental factor most likely changed from 2015 to 2018?
A
A fire made the blades of grass short.

B
Less rainfall made the grass turn brown.

C
More nutrients made the grass grow quickly.

D
High temperatures made the grass turn green.

__________is the most important condition for fossilization.

Which of the following statements about hormones are accurate? (Select all that apply.)
Insulin is a hormone produced in the thyroid gland.
Sexual changes during puberty are prompted by hormones produced in the gonads.
Most hormones have more than one function.
The pituitary gland makes hormones that regulate other endocrine glands.

Explain if you want brainliest

NEED BIG HELP 30 POINTS a please hurry and no links. Please make the answer correctly.
3. How do gases from the air help break down rocks?

4. How does erosion make more soil? *

5. Explain how erosion can be helpful to the environment. *

6. Explain how erosion can be harmful to the environment. *

Summarize the functions of blood below by providing a description:
Protection
Transportation
And temperature regulation
If anyone could help me with this I say thank you!

If you had shown mitosis in a plant cell instead of an animal cell, which feature would you have to change ?

if one test tube is being heat up by a bunsen burner and connected to another test tube that is not being heat up. Why would there be a flatline at one of point of their boiling point?!

Rift valleys can form when fractures in Earth’s crust widen. The valley walls slowly move at a rate of only a few millimeters a year. Which of these best describes the type of tectonic activity that forms rift valleys?

Sequence the path of air through the respiratory system by providing descriptions for body parts and their functions:
mouth / nose
pharnyx
larynx
trachea
bronchi
lungs
bronchioles
and alveoli
If you could help me I'd greatly appreciate your answer!

Write a paragraph about the importance of the ocean.​

PLEASE HELP ASAP WILL GIVE BRAINLIEST! ANIMALS YOU NEED TO USE ARE HERE: Algae, alligator, bacteria, bass, bear, bladderwort,bream,butterfly, butterfly larva, cattail, cute, crayfish, cricket, cypress tree, dandelion, Florida panther, fox, frog, fungi, Gambusa, garfish, gopher tortoise, grat, Kork, Heron, Killifish, Live oak tree, Millard duck, Manatee,mangrove trees, mice, mosquito, water, owl, pelican, Pine tree, rabbit, raccoon, Rattlesnake, scrub Jay, shrimp, skunk, snail, snail kite, water hyacinth, water lily, wild guava, white tailed deer, woodpecker, Woodstork, and worms.

What are two decomposers that live in streams and rivers/freshwater biomes? Need for major grade. Give one hundred points, and Brainliest, but if you answer my question correctly, can you tell me how to choose Brainliest too? Thanks!

What PHYSICAL characteristics occur during the digestive process?

open to view question

In humans, a widow’s peak hairline is determined by the dominant allele (W), and a straight hairline is determined by the recessive allele (w). If a male is heterozygous for a widow's peak and a female has a straight hairline, what is the probability they will have a child with a straight hairline?


100%

50%

75%

25%

Fossils that show the intermediate state of an organism between an ancestor and a later descendant are called transitional forms. Transitional forms would most likely be found
A
living as their own species.

B
in layers of sediment above ancestral forms.

C
living as modern-day organisms.

D
in layers of sediment below ancestral forms.

The folded mountains is an example of which type of plate boundary?

What important decomposer did the econauts leave out of the biodome and why was that important?

I will give brainliest and thanks to the first person to answer! :) What were the econauts in the biodome doing with their dead matter and how is it connected to the decomposers?

Hey, I need to know what states each number and letter represents ASAP. Pretty sure this is on the Chesapeake Bay Watershed. No files please. Thanks!

Help pls asap ill give brainliest if u get i right ;)

please help me with this. I will give you brainliest