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sesenic [268]
3 years ago
14

 Which of the following does not lay amniotic eggs? 

Biology
1 answer:
Fiesta28 [93]3 years ago
7 0
<span>B. Marsupials. </span>Amniotic eggs is a unique kind of egg because they possess a semipermeable shell to protect the egg but it also allows gas exchange. Inside an amniotic egg contains the amnion, chorion and allantois. Animals that lay amniotic eggs are called amniotes, which include reptiles, birds, dinosaurs, monotremes (platypus).
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Bones give us shape, protect internal organs, and
LenaWriter [7]

Answer: help us move ? it might also be that the support our body.

Explanation: im not too sure but i think this is the answer

3 0
3 years ago
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What color marble represent the female chromosomes?​
Andre45 [30]

Answer:

it is colour less their is no colour ...

8 0
2 years ago
After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Sci
zhannawk [14.2K]

Answer: Directional selection

Explanation:

In the population genetics, directional selection is the mode of selection during which the extreme phenotype are favored more than the other phenotype.

This causes the allele frequency to shift towards the time in the direction of that particular phenotype.

Here, in the question the acid tolerant plant species is favored over the other phenotype.

Hence, the correct answer is option D

3 0
3 years ago
Describe all muscle tissues, including cell shape, layers, intercellular connections,
zmey [24]
<h2>Description of muscle tissues. </h2>

Explanation:

There are three types of muscle tissue are cardiac, smooth, and skeletal.  

1. <u>Cardiac muscle tissue:</u><u> </u>It is located in the walls of the heart.

They appear striated.  

Control is involuntary.

Function: To pump blood through the blood vessels in your body.

2. <u>Smooth muscle tissue:</u><u> </u>It is located in walls of hollow visceral organs, except the heart.

They appear spindle-shaped.

Control is involuntary.

Function: To move food through the digestive tract.  

To regulates air flow in lungs.

3. <u>Skeletal muscle tissue:</u> It occur in muscles which are attached to the skeleton.  

They appear striated.

Control is voluntary.

Function: To support the body.

It makes bones and other body parts move.

<u>Cell shape :</u> There are different shapes of cells which are as follows:

1. Squamous 2.Cuboidal 3. Columnar 4. Polygonal  5. Stellate

6. Spheroid 7. Discoid 8. Fusiform 9. Fibrous.

<u>Muscular layer:</u> The muscular layer is present in many organs in the vertebrate body.

It is responsible for peristaltic movement in body.

There are two layers of muscle.

1. Inner 2. Outer layer.  

<u>Inner layer:</u> The muscle of the inner layer is arranged in circular rings around the tract.

<u>Outer layer:</u> the muscle of the outer layer is arranged longitudinally.  

<u>Intercellular connections or junctions: </u>These are the structures which provide adhesion and communication between cells.  

There are mainly three types of junctions:

1. <u>Tight junctions: </u><u> </u>It help to stop substances  from leaking across a tissue.

2. <u>Adhering junctions:</u> It perform the  function of cementing so as to  keep neighbouring cells together.

3. <u>Gap junctions:</u> It facilitate the cells to  communicate with each other by connecting the cytoplasm of adjoining  cells, for rapid transfer of ions, small molecules and sometimes big molecules.

7 0
3 years ago
What factor causes the dna fragments to move in this technique
kkurt [141]
I believe the answer would be <span>Gel electrophoresis.</span>
3 0
3 years ago
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