When a chromosome pair fails to separate correctly in meiotic division, what is it called?a. Chromosome deletions
b. Crossing-over
c. Nondisjunction
d. Trisomy

Answers

Answer 1

Answer: C. Nondisjunction.
Nondisjunction is the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during nuclear division. This can result in deformities in a new-born such as Down Syndrome, due to lack of chromosomes in the body.

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Calcium reabsorption by the kidneys is promoted by the hormone called _______

Answers

parathyroid hormone (PTH)

A single carbon atom can form a maximum of how many single covalent bonds

Answers

A single carbon atom can form a maximum of 4 single covalent bonds.

Why can the carbon atom form this ?

This is because carbon has 4 valence electrons, which are electrons that are available to form bonds with other atoms. Each single covalent bond consists of 2 valence electrons, so a single carbon atom can form a maximum of 4 single covalent bonds.

Carbon atoms can also form double and triple covalent bonds, which consist of 4 and 6 valence electrons, respectively. However, a single carbon atom can only form a maximum of 4 covalent bonds in total.

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I think it is carbon atom can form a maximum of 4 single covalent bonds... This is because it has 4 electrons and needs to reach a total of 8, so it can make up to 4 covalent bonds to gain the electrons it needs. I wish it help. Please comment

Compare and contrast starch, cellulose, and glycogen by using clues to complete this table.

Answers

Final answer:

Starch, cellulose, and glycogen are polysaccharides composed of glucose. Starch and glycogen, both used for energy storage, are branched polymers with α-1,4 and α-1,6 glycosidic linkages while cellulose, used for structural support, forms a linear structure with rigid β-1,4 glycosidic linkages.

Explanation:

Starch, cellulose, and glycogen are all polysaccharides composed of glucose units. Starch is a branched polymer which is the primary form of energy storage in plants. It has α-1,4 and α-1,6 glycosidic linkages without the tight crosslinks of cellulose, hence it is less rigid than cellulose.

Cellulose is a linear chain of glucose molecules and forms rigid β-1,4 glycosidic linkages, serving as a structural component in the cell walls of plants and other organisms. Due to its arrangement, it is rigid and forms the structural fiber in plant-based foods.

Glycogen is also a branched polymer, and is the principal storage form of glucose in animal cells and bacteria. While the glycosidic linkages in starch and cellulose differ, glycogen, similar to starch, has α-1,4 and α-1,6 linkages. These different molecular structures allow carbohydrates to serve varied functions such as energy storage (starch and glycogen) and providing structural support (cellulose).

Learn more about Polysaccharides here:

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One day younger brother of Sanjay asked difference betweentendon and ligament. Being a responsible student of science
Sanjay explained him such questions properly. His younger brother
satisfied with his answer and thanks him.

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Answer:

then what no answer for this question.

Why do people get asma

Answers

The most common way I believe you can get it is from another family member. Not in the sense that it's contagious, but that it's genetic. You can also get it from stuff in the air you might be allergic to such as dust or pollen. Diseases and infections in the chest will further provoke it. If you smoke, you are also more likely to get it. Also, if you are overweight it puts a strain on your lungs so your more likely to have an attack.

Well, It could be genetic, like if your mom has it then you might be likely to have it,
It could also be because of exercising. . So when you work out you could get it
It could also be due to cough or old age.

What role do autotrophs (producers) play in ecosystems?