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vivado [14]
3 years ago
13

Which is an example of a ray-fin fish? lungfish O coelacanth O shark salmon

Biology
1 answer:
7nadin3 [17]3 years ago
8 0

Explanation:

its showing all but salmon so im not sure,sorry, still trying

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Either an element or<br> mpound that cannot be<br> physically separated
stira [4]

Answer:

Substance

<u>Review</u>:

  • <u>Element</u>:

⇒ One of a class of substances that cannot be separated into simpler substances by chemical means.

<u>Compound</u>:

⇒ A pure substance composed of two or more elements who composition is constant.

7 0
2 years ago
What kind of channels are located in the input region?
tamaranim1 [39]

Answer:

The correct answer is option B ( ligand gated channels opened by neurotransmitter molecules).

Explanation:

Input region or postsynaptic region or dendrite is the site of neuron cell which receives the impulse from the pre-synaptic neuron at the synaptic junction.

The cell membrane of the dendrite is embedded with ligand-gated channels which opens up in response to the ligand (neurotransmitters) produced by the neurotransmitter vesicle of axon or output region of neuron.

The neuromuscular junction is such a case where acetylcholine receptors present in the dendrite opens in the presence of acetylcholine.

Thus, option B ( ligand-gated channels opened by neurotransmitter molecules) is the correct option.

8 0
3 years ago
Undifferentiated cells in a tissue that can become specialized cells of that tissue, but not of other tissues, are __________ ce
lara31 [8.8K]

The answer is stem cells, they consist of classes of cells that are undifferentiated and are able to be classified them into types like specialized cells. They consist of having two main sources that will help them develop and mature, these main sources are called the embryonic stem cell and the adult stem cell.

5 0
3 years ago
Which is an example of codominance? (1 point)
Dafna11 [192]

Answer:

roan coat color in horses

Explanation:

Codominance is one of the Non-mendelian inheritance patterns in genetics i.e. does not follow Mendel's principles of inheritance. Codominance is a phenomenon whereby an allele is neither dominant nor recessive to another in a gene i.e. one allele is not phenotypically expressed over the other. Hence, both alleles are simultaneously expressed in their heterozygous state.

An example of codominance is the roan coat color in horses where the colored (B) and white (W) alleles are both dominant in the coat color gene, hence, the horse expresses both black and white coat phenotypes known as ROAN (BW). The black and white alleles are said to be CODOMINANT.

8 0
3 years ago
Of the answer choices, what is the most likely reason that paracrine signaling does not activate the cell that is producing the
riadik2000 [5.3K]

Answer:

The correct answer is The cells do not have proper receptor.

Explanation:

During paracrine signaling a signaling molecules are generated from one cell.The generated signaling molecule then binds to the receptor of neighboring cell to carry specific signal from donor cell to the acceptor cell.

  But the signaling molecules will not bind to the cell that is producing it because that producing cell do not contain proper receptor to bind that signaling molecule.

 The binding of signaling molecule to the receptor of its producing cell occur during autocrine signaling.

 

3 0
3 years ago
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