BIOLOGY HIGH SCHOOL

Which of the following show all four chordate characteristics?Larval and adult urochordates
Larval cephalochordates and adult urochordates
Larval urochordates and adult cephalochordates

Answers

Answer 1
Answer: "Larval cephalochordates and adult urochordates" is the one among the following choices given in the question that show all four chordate characteristics. The correct option among all the options that are given in the question is the second option or the penultimate option. I hope the answer helped you.

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Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the vessel contains blood and has valves. What is the blood vessel that he is observing?a. capillary
b. vein
c. lymph
d. artery

Answers

The right answer is vein (it contains blood and has valves).

The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.

Answer: b. vein

Vein is a blood vessel that exhibit thin muscular walls and it brings the deoxygenated blood  from all the cells, tissues and organs back to the heart. In the veins the valves are present which prevent the backward flow of blood. Lumen of the vein is wide.

According to the above information vein is the correct option.

Membrane-bound organelles are not found in the cells of? A) bacteria. B) fungi. C) plants. D) protists.

Answers

Answer: A) Bacteria.

Bacteria are the most primitive life forms on earth. Organelles are the subcellular compartments of cell enclosed by lipid layer and impart the specific function to it.

Bacteria are prokaryotes, thus lack membrane-bound organelles. Whereas Fungi, Plants, and Protist being eukaryotes, consist of membrane-bound organelles.

Which scientist is responsible for the theory known as “survival of the fittest”?a. Pasteur
c. Faraday
b. Mendel
d. Darwin

Answers

Darwin is know as survival of the fittest it is also know as Darwin theory of evolution

Answer:

D darwin is the answer

Explanation:

which relationship between two species listed would be mutually beneficial A) a fish and a leech B) a dog and a tick C) a flower plant and a bee or D) a tree and a caterpillar ?

Answers

I think that the answer is C. :)

The spheres that only earth has are a _____.A.) hydrosphere and lithosphere
B.)hydrosphere and atmosphere
C.)hydrosphere and biosphere
D.)hydrosphere and cryosphere

Answers

Answer:

The correct answer is option C, hydrosphere and biosphere

Explanation:

It is the planet earth that consists of hydrosphere (water ) and biosphere (living things) that are distinctive of other planets. Most of the planets have  atmosphere but they are not of the same quality as that of planet earth that could support life. Also some planets have frozen water (cryosphere) beneath their surface crust such as moon , venus etc. and lithosphere is present in all the planets with distinctive features and characteristics from each other.

Actually it’s C.ALL planets have a atmosphere but it’s toxic. We have a BIOSPHERE that’s what makes things LIVING.

Select all that apply.How are protists different from bacteria and archaea?

1. They are at least ten times larger.
2. They can reproduce asexually.
3. They are eukaryotes.
4. They consist of both single- and multi-celled organisms.
5. They have flagella to move

Answers

3. they are eukaryotes
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