BIOLOGY HIGH SCHOOL

What is an important characteristic of the plant cell wall?a. It is fluid.
b. It is rigid.
c. It is alive.
d. It stretches.gy

Answers

Answer 1
Answer:


The best answer is b - it is rigid.

The cell wall is defined as the rigid, outermost layer found in plants and also certain bacteria, algae and fungi. It is absent in animal cells.

The plant cell wall is made up  cellulose which is a structural carbohydrate. The cell wall is rigid and thus offers structural support allowing plant such as trees to grow to great heights.

It also helps prevent water loss, helps protect against insects and pathogens and keeps the shape of the plant.
Answer 2
Answer:

the answer to this question is B because im doing a bilogy test right now as u read this :)

Related Questions

Question 1 of 102 PointsEarlobes can be either attached or detached. The allele for attached earlobesis recessive (e), and the allele for detached earlobes is dominant (E). Whatmust be true if a boy is born with attached earlobes?A. He has a heterozygous genotype.O B. He has no E alleles.C. He has no recessive alleles.O D. He has one of each allele,SUBMIT
The moon's gravitational pull causes _____.deep ocean currents deep ocean waves longshore currents tides
An introduction on Evolution in animals (fish and rat specially) also including homologous and analogous!
If carbon dioxide is needed for photosynthesis and water is plentiful, which of the following is likely to occur?A. The stomata will close until enough water is lost. B. Water pressure is going to decrease in the guard cells. C. Additional water will be gained and the plant cells will become rigid. D. The stomata will open until too much water is lost
True or false ferns grow in wet areas

which of the following would not be considered a point source pollution contributor a. an animal feed lot b. cattle on rangeland c. a paper mill d. a slaughterhouse

Answers

The correct answer should beb. cattle on rangeland

Point source pollution contributors are any pollution contributors that can be pinpointed to a single location, and dispersed cattle on a rangeland is not it. A a paper mill or a feed lot or a slaughter house can easily be pinpointed.

Look at the albino whale people have named Migaloo. The white color is the result of mutations in the genes that code for the proteins responsible for skin color. Is Migaloo's white color likely to be an advantage in its current environment? Explain your answer.

Answers

Answer:

Yes

Explanation:

If Migaloo is albino he mostlyly lives with snow and a lot of white in his souroundings. Since he is white and everything eles is white he can blend into he souroundings to hide from anything trying to attack/eat him.

Which of the following statements is true? Acquired mutations are passed down from parent to offspring. Mutations are the most fundamental way to add new genes to a gene pool. Hereditary mutations are caused by external factors, such as radiation. Only somatic mutations are important to evolution because they can be inherited.

Answers

Answer: Mutations are the most fundamental way to add new genes to a gene pool.

Explanation:

A mutation is either permanent or temporary changes that may occur in the DNA sequence of the organism that makes up a gene which is the functional unit in the organism. These mutations will add genetic variations in the gene pool of the population. Those mutations which are hereditary which means they can be transmitted from parents to offsprings are called as germline mutations.  

Acquired (somatic) mutations are those mutations which occur's during a persons life. These mutations occur due to ultraviolet radiations. These mutations occur in the somatic cells not in the germ cells therefore, these cannot be passed from one generation to the next.

Acquired mutations are passed down the line.

What are the unique properties of the echinoderms within higher invertebrates?

Answers

The unique property of an echinoderm within higher invertebrates is their radial symmetry. These echinoderms include the famous starfish, sea urchin, sand dollars, sea cucumbers, and sea lilies. They are found at the ocean depth, form the intertidal zone to the abyssal zone.

Classify the statements below as describing proto-oncogenes or tumor suppressor genes. 1. Some products of these genes normally function in repairing damaged DNA. 2. These genes code for proteins that normally promote cell division. 3. Mutations that increase activity of these genes may lead to cancer. 4. These genes code for proteins that normally prevent uncontrolled cell division. 5. Loss-of-function mutations in these genes may lead to cancer.

Answers

 2. These genes code for proteins that normally promote cell division. 

DNA genetic code  is copied in a process called transcription when the cell needs to make some proteins that it needs, that is during the process of protein synthesis.

In the cell nucleus, transcription occurs when coded information  is copied (transcribed)  from DNA onto messenger RNA (mRNA)  with the help of an enzyme called RNA polymerase.

A cell turns glucose from thefood we eat into energy for our
body to use. What cell function
does this describe?


Answers

Answer:

\boxed {\boxed {\sf Cellular \ respiration}}\n

Explanation:

The process of cellular respiration occurs in the mitochondria of cells. It goes through 3 stages: glycolysis, the citric acid/Krebs cycle, and the Electron Transport Chain.

The equation is:

C_6H_(12)O_6+6O_2 ->6CO_2+6H_2O+38 \ ATP

In this aerobic process (requires oxygen), glucose (C₆H₁₂O₆) from the food animals eat or produced from photosynthesis and oxygen are converted into carbon dioxide, water, and useable energy (ATP).

So, the cell function described is cellular respiration.
Other Questions
Nancy visits a local reservoir where she feeds ducks and other birds. Every time she feeds them she notices that they fight for the best pieces and some do not get any. All living things struggle to get the necessary amount of food, water, and shelter. What is the term for this struggle?A. overproduction B. natural selection C. variation D. competition
Is the following sentence true or false? The composition of the atmosphere changes every few kilometers as you move away from Earth.
Which statement is true? a. Prokaryotic cells have multiple membranes. b. Eukaryotic cells have one membrane. c. Prokaryotic cells do not have a membrane. d Eukaryotic cells have multiple membranes
Which part of the atom is involved in bonding?A.Valence electronsB.ProtonsC.All electronsD.Ions