BIOLOGY HIGH SCHOOL

_______ make(s) the walls of plant cells strong and rigid.a. Pectins
b. Gums
c. Oligosaccharides
d. Cellulose

Answers

Answer 1
Answer: The correct answer is D. Cellulose is what makes the walls of plant cells strong and rigid. Cellulose is a polysaccharide that is very important for their structural role in animals and plants. It gives rigidity to the cells of a plant.
Answer 2
Answer:

Answer:

D. Cellulose

Explanation:

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Determine the amount of potential energy of a 5.0Kg book that is moved to three shelves on a bookcase. The height of each shelf is 1.0 meters, 1.5 meters, and 2.0 meters.
Which statement about inheritance is true?Girls get most of their traits from their moms; boys get most of their traits from their dads. Male offspring will always have an X-linked genetic disease if the mom is a carrier. Fathers always determine the gender of the offspring in humans. Males never have Y chromosomes.
The diagram shows the food web of desert ecosystem. Which sentence correctly describes a possible flow of energy among organisms in a food web? A. From hawks to snakes to lizards B. From scorpions to Beatles to lizardsC. For Mastel is it to miceD. From Beatles to lizards to sneak

A biodegradable substance is

Answers

A biodegradable substance are materials that can naturally break down/decompose without causing harm.
A substance that can be broken down naturally by nature by decomposers or scavengers.

Chromosomes, which contain DNA, have several functions. All BUT ONE of these statements is a function of chromosomes. A) Chromosomes determine the traits of an organism. B) Chromosomes provide instructions to make proteins. C) Chromosomes determine the gender of an individual. D) Chromosomes help an organism produce usable energy

Answers

Answer: The correct option is D) Chromosomes help an organism produce usable energy.  

Chromosomes are the thread like structures made from the packaging of the nucleic acid DNA. They are localized in the nucleus of most living organisms.

Chromosomes do not help an organism to produce usable energy.

Rather they provide instructions to make proteins in the form of genes ( segment of DNA providing information for protein). Proteins are therefore used in determining traits of an organism. Chromosomes are also used in determining gender of an individual. For instance, the presence of Y chromosome determine the male sex and XX determines the female sex amongst human.

Thus, option D) is not the right function of chromosomes.
The correct answer is 

D) Chromosomes help an organism produce usable energy


Chromosomes do not, in any way, help and organism produce usable energy.

Which of the following is true about scientific theories? I. New research is often done to learn more about existing scientific theories. II. Scientific theories can be revised, changed, or even rejected. III. Scientific theories are considered to be facts and cannot ever be modified. IV. New scientific theories can be formed to explain new phenomena.

Answers

scientific theories can be revised, changed, or even rejected.

I need help can someone help me ?

Answers

Answer:

A) The main functions of mitosis are growth and repair. Some cells once fully formed do not undergo cell division, such as nerve cells and muscle cells. Since you can never re-grow or repair these types of cells once they are mature, you must take care of the ones you have.

Explain how the blood from an injured fish can reach the nose of a shark

Answers

The blood from an injured fish can reach the nose of a shark through the water. The shark’s olfactory organs detect the scent of the blood molecules dissolved in the water, which triggers the shark’s hunting behaviour

Herbivores, carnivores, and omnivores help make up food chains.TRUE
FALSE - only herbivores and carnivores do
FALSE - only carnivores do
FALSE- only herbivores and omnivores do

Answers

True! Every living thing can be apart of a food web or chain.
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Derek takes protein supplements before and after his workouts. He told his workout partner that he became 200% stronger within a couple of months after he added the supplements to his diet. His report about the effects of the supplements is an example of a(an) ________.
Fungal cell walls are composed of what material?