BIOLOGY HIGH SCHOOL

(20 POINTS + BRAINLIEST) What polysaccharide provides rigidity and strength in plants?--
a) Glycogen
b) Starch
c) Cellulose
d) Chitin

Answers

Answer 1
Answer:

I believe it would be C) Cellulose. As this is one of the essential components found in the cell wall of plant cells.
Answer 2
Answer:

I belive the answer is C) Cellulose :)

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A hormone is an organ that secretes chemical substances into the bloodstream. Please select the best answer from the choices provideda. True
b. False

Answers

The correct answer is; b. False

A hormone is not an organ. Hormones are chemical substances that are produced in the endocrine glands in the body. Hormones act as special messengers by controlling almost all bodily functions such as hunger, reproduction, emotions and mood. Examples of hormones and their major function are insulin (metabolic hormone), estrogen (sex hormone), adrenalin (stress hormone), ghrelin (hunger hormone), leptin (satiety hormone), melatonin (sleep hormone), testosterone (sex hormone) and thyroid (growth hormone).


Answer:

The answer is B.

Explanation:

A hormone is a chemical substance produced and released by endocrine glands to help regulate bodily functions.

-Just took the quiz on edge

Group of organelles that is common to both plant cells and animal cells.

Answers

-Cell membrane
-Cytoplasm
-Rough ER
-Smooth ER
-Golgi Body
That's all I can think of
However, if you check out "cells alive" website. There are interactive diagrams of cells that contain organelles

A cross-section of a tree trunk shows 20 dark-colored rings and 20 light-colored rings. What is the likely age of this tree?

Answers

Trees produce 2 colored rings per year and so by counting these rings you can have an idea as to how long the tree has lived. With 20 dark-colored rings and 20 light-colored rings, the tree is likely to have stood up for 20 years. I hope this helps. 
The likely age of a tree that shows 20 light colored rings, and 20 dark colored rings is 20 years old. Each year of a tree's life is represented by a dark and a light part. The type of life that a tree has had can also be learned by looking at the rings. If rings are not even or concentric you can tell that a tree was leaning, or was growing in a windy area. You can also judge the health of a tree by how the rings are spaced.  

What does stirring do in an experiment

Answers

It mixes all the chemicals in the expiment together. But it can also ruin an experiment depending on what type of experiment you are doing.

How are mitosis and meiosis different from each other? A.
Meiosis produces gametes and mitosis produces cells for the organism to grow and repair itself.

B.
Mitosis produces sperm and egg cells and meiosis produces cells for the organism to grow and repair itself.

C.
Mitosis produces four daughter cells and meiosis produces two daughter cells.

D.
Mitosis produces four different cells and meiosis produces identical cells.

Answers

Meiosis produces gametes and mitosis produces cells for the organism to grow and repair itself.

When DNA is copied, sometimes a new, incorrect, base pairing appears within the structure of a new DNA molecule replacing original base pairs. This mistake is called a base-paira. deletion
b. institution
c. Substitution

Answers

Answer: The correct answer is C) Substitution.

Substitution is a type mutation ( permanent change in the genetic material of the organism) that is caused by the exchange of one base with another.

This can occur during the process of DNA replication when an incorrect base is added in the new DNA molecule and thus replacing the original base pair. This can result in formation of new amino acid ( that result in different protein) or it may form a truncated protein ( when stop codon is produced due to substitution).
it would be substitution because an incorrect base pair is being replaced.
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