What does evidence show about radial symmetry in invertebrates?

Answers

Answer 1

Answer: Radial symmetry evolved at least twice in unrelated invertebrates groups.

Hope this helps.

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Limiting contact between gamma rays and healthy tissue is important because?

Answers

Gamma ray is high-frequency electromagnetic radiation. It is known that gamma rays are able to damage DNA molecules in the cells by interrupting DNA strands. That characteristic of gamma rays is used in the treatment of tumors. An idea was that gamma rays will damage DNA molecules of tumor cells and, consequently, prevent uncontrollably divisions of tumor cells. But, in treatments, it is very important to limit contact between gamma rays and healthy tissue. This way it will be minimized damage of DNA molecules in healthy cells.

Answer: gamma rays are high energy and may cause damage to healthy cells.

Explanation: I took the test!!

Which of the following nutrient cycles has its largest reservoir in the atmosphere?A) Carbon cycle
B) Nitrogen cycle
C) Potassium cycle
D) Phosphorus cycle
E) Water cycle

Answers

I would actually say carbon since the carbon cycle takes place mostly in the atmosphere while the nitrogen cycle takes place mostly below ground.

Plasmodium is a protist that causes malaria. A hypothetical drug targeting the outer membrane of plasmodium could cause cell rupture of the protist and help prevent malaria. What specific protist structure would this drug target

Answers

Answer;

-Pellicle

Explanation;

-Protist cells may contain a single nucleus or many nuclei; they range in size from microscopic to thousands of meters in area. Protists may have animal-like cell membranes, plant-like cell walls, or may be covered by a pellicle.

-On a paramecium's exterior is found the pellicle. The pellicle is stiff to maintain the paramecium's shape and provide stability but it is also flexible to allow movement. It also acts as an attachment site for external organelles such as cilia.

Answer:

Pellicle.

Explanation:

Malaria is the most significant parasitic disease of human. The disease is caused by protozoan of the genus Plasmodium. The most serious malignant malaria is caused byPlasmodium falciparum. It is transmitted by the female Anopheles mosquito. Plasmodium is a protist that cause malaria. Different types of species of the plasmodium are: P.vivax, P.malaria, P.ovale and P.falciparum which causes the most serious malignant called malaria.

Protist have animal-cell like membrane and is plasmodium is the example of protist. Its contain single nuclei or many nuclei. On a paracium exterior found a pellicle. Pellicle is a layered structure which surrounds the cells in many types of protozoa and also surrounds the cytoplasm. It is the non-extracellular like the cell wall of plants.

Which part of the kidney acts as a funnel to pass the urine that is produced in several nephrons to the ureters? A. Medulla

B.
Cortex

C. Renal pelvis

D.
Renal vein

Answers

c. renal pelvis is the answer

I do think that the answer is C

What kind of relationship does a tapeworm have with the cow whose gut it is living in

Answers

This relationship would be called parasitism. Its when one individual lives on or in and feeds on a host organism.

In a community, there are five brown squirrels, five grey squirrels, and ten white squirrels. what is the relative abundance of brown squirrels?A 5%
B 20%
C 25%
D 50%

Answers

i think the answer is C.25%

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The strongest plant cells are?