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Soloha48 [4]
2 years ago
9

Homologous chromosomes may exchange segments; this is called crossing over. Crossing over increases genetic variability. When do

es crossing over occur?
Question 2 options:


Meiosis II



Mitosis



Both mitosis and meiosis--crossing over may occur at any time during the cell cycle.



Meiosis I


Question 3

In order for meiosis to create four, genetically different gametes, DNA replication must occur. Which of these best describes when DNA replication would occur?


Question 3 options:


prior to meiosis II



prior to meiosis I and meiosis II



prophase I in meiosis I



prior to meiosis I

Question 4 (1 point)
The embryo's development as seen here represents which processes in the development of any multicellular organism?


Question 4 options:

meiosis followed by mitosis.


mitosis and cell differentiation.


protein synthesis followed by meiosis.


meiosis and cell differentiation.

Question 5
Why do some organisms reproduce aseggsually?

Question 5 options:

To rapidly produce like offspring


To increase genetic diversity


To have a variety of offspring at the same time


To get rid of genetic problems while reproducing
Biology
1 answer:
Serhud [2]2 years ago
6 0

A) Crossing over occurs in : Meiosis I ( D )

B) DNA replication would occur : Prior to meiosis I and meiosis II ( B )

C) The embryo's development represents ; meiosis and cell differentiation ( D )

D) Some organisms reproduce aseggsually ; To rapidly produce like offspring

<h3>What is Crossing over and DNA replication</h3>

Crossing over involves the swapping of genetic materials, and it occurs in prophase I of meiosis before meiosis II the crossing over of genetic materials are over. while DNA replication is the process whereby DNA make an exact copy of itself during the process of cell division and this process occurs prior to meiosis I and meiosis II

The development of an embryo in the missing diagram represents meiosis and cell differentiation.

Hence we can conclude that the answers to your questions are as listed above.

Learn more about Homologous chromosomes :  brainly.com/question/8253366

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Match the level of organization in nature
Volgvan

Answer:

lvl 2 - Molecules consist of atoms

lvl 3 - Cells consist of molecules

lvl 4 - Organisms consist of cells

lvl 5 - Populations consist of organisms

lvl 6 - Communities consist of populations

lvl 7 - Ecosystems consist of communities interacting with their environment

lvl 8 - The biosphere consists of all ecosystems on Earth

Explanation:

4 0
3 years ago
Match the following terms and definitions 1. lysosomes and peroxisomes small storage sacs containing water, food, and waste 2. v
Readme [11.4K]

ok so I've done this problem before trust me:

A. bundles of microtubules that separate to opposite poles of a cell - CENTRIOLES

B. prepares protein-packed vesicles for release outside of the cell - VESICLES

C. small storage sacs containing water, food, and waste - VACUOLES

D. rough and smooth organelle that produces protein, steroids, and lipids - ENDOPLASMIC RETICULUM

E. tiny sacs at the end of the ER which contain protein - GOLGI COMPLEX

F. chains of protein fibers that provide support and shape - CYTOSKELETON

G. powerful enzymes used to process cellular activity - LYSOSOMES & PEROXISOMES

H. whip-like structures on cells that are used for movement - FLAGELLA

I. produces and assembles proteins - RIBOSOMES

5 0
3 years ago
Describe the flow of blood through the human body, including through each of the four chambers of the heart. Explain how the blo
Phantasy [73]
Unoxygenated blood from veins enters the right atrium then it goes down to the right ventricle then out through the pulmonary artery to the lungs where it becomes oxygenated blood which then enters the heart through the pulmonary veins and it goes to the left atrium and then is pumped down to the left ventricle and out through the aorta to the arteries where it travels to different organs and becomes deoxygenated and then the cycle repeats itself.
8 0
3 years ago
Read 2 more answers
What are some effects of prostaglandins in the body?
Amanda [17]

A class of lipids called prostaglandins is typically produced at the sites of injury or infection and is used to treat both disease and injury. They regulate functions like blood flow, blood clot formation, inflammation, as well as labor induction.

Arachidonic acid, from whom prostaglandins are generated, is what causes inflammation:

  1. In synthetic form, prostaglandins are used to induce labor and give birth.
  2. They trigger uterine contractions and have a ring structure with at least two or three and perhaps more carbons.

Effects of prostaglandins in the body are

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  • The production of the inflammatory response is significantly influenced by prostaglandins. Their production is markedly increased in inflamed tissue, therefore they help to produce the essential symptoms of acute inflammation.
  • NSAIDs (which inhibit cyclooxygenase) as well as COX-2 selective inhibitors, sometimes known as coxibs, were examples of prostaglandin antagonists. Cyclopentenone prostaglandins as well as corticosteroids, which block the formation of phospholipase A2, might help to reduce inflammation.

To know more about  Prostaglandins here

brainly.com/question/27180318

#SPJ4

4 0
1 year ago
What is the relationship between biodiversity and number of populations?
noname [10]
Biodiversity increases as the number of populations grow, because a greater population generally means a more diverse one.

However, this is not always true, so I'm not sure what answer they're looking for.
7 0
3 years ago
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