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Talja [164]
3 years ago
10

What two materials does the cardiovascular system deliver to the cells of the body?

Biology
1 answer:
ZanzabumX [31]3 years ago
7 0

B. It delivers nutrients and oxygen.

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Cnidarians and Ctenophores are alike in the following way: a) they are scavengers and parasites. b) they are both diploblastic.
alexandr1967 [171]

Answer:

Options B.

They are both diploblastic.

Explanation:

Cnidarians are group of aquatic animals that live both in fresh water and Marine water. They are distinguished by the possession of specialized cells called cnidocytes for capturing prey. They are radially symmetrical and have two body layers ectoderm and endoderm separated by jelly layer called mesoglea.

Examples are Hydra, corals, sea anemone and jelly fish.

Ctenophores are phylum of Marine animals that are found in every where. They are characterized by vast of cilia which is use for swimming. They are bilaterally symmetrical , they have mouth and don't have anus. They don't have respiratory, excretory and circulatory system. They are diploblastic i.e they have two body layers but some are triploblastic.

They have nemacyctes for capturing prey.

Examples are nuda, tentaculata e.t.c.

7 0
2 years ago
Describe what molecular biologists mean by an rna world
Karo-lina-s [1.5K]
<span>The RNA world is the hypothesized format of chemical life that existed prior to our current DNA and RNA world. In the RNA world, RNA molecules formed in the primordial soup and began to evolve by self-replication and mutation. This led to increased complexity, natural selection of "better" RNA and diversification of RNA based life.</span>
5 0
3 years ago
Look at the image below. Which of the following is taking place? *
ankoles [38]

Answer:

i will try my best here goes

Explanation:

i believe it is O Cytokinesis in an animal cell because there is the formation of a cleavage furrow.

7 0
2 years ago
Draw the structure of DNA nucleotide with adenine as nitrogenous base <br>​
zavuch27 [327]

Answer:

A nucleotide is made up of one sugar molecule, one phosphate molecule and one of the four bases. Here is the structural formula for the four nucleotides of DNA. Note that the purine bases (adenine and guanine) have a double ring structure while the pyrimidine bases (thymine and cytosine) have only a single ring.

Explanation:

A nucleotide is made up of one sugar molecule, one phosphate molecule and one of the four bases. Here is the structural formula for the four nucleotides of DNA. Note that the purine bases (adenine and guanine) have a double ring structure while the pyrimidine bases (thymine and cytosine) have only a single ring.

5 0
3 years ago
What has not increased the worlds food production in the last 100 years?
Marizza181 [45]

Answer:

The answer must be c: natural selection

Explanation:

All the other answers only help rappid food production which will lessen the use of natural selection over time.

8 0
3 years ago
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