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Nataly_w [17]
3 years ago
6

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. Determine the blood vessel being observed.
Biology
2 answers:
Ulleksa [173]3 years ago
7 0
Vein because they have valves to prevent back flow of blood.
Cloud [144]3 years ago
5 0
I think the correct answer for this would be the veins. Ralph is observing a vein since he notices  that the vessel contains blood and<span> which is the function of the veins - to carry blood around the body. Hope this answers the question. Have a nice day.</span>
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Yes that is right thats the disease

3 0
3 years ago
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A student used poster board to construct this model of DNA.Which statement describes this model of DNA?
pantera1 [17]

Answer:

The model is inaccurate because the base pairs are incorrect.

Explanation:

The model of DNA that the student made was:

G-G

A-A

T-T

C-C

G-G

A-A

T-T

C-C

The model is pairing the bases incorrectly since guanine (G) forms a base pair with cytosine (C) and adenine (A) with thymine (T). In other words, the bases do not pair with the same type.

The DNA strands, which have deoxyribose, phosphate groups, and different bases, are together thanks to hydrogen bonds between the pairs. The pair G-C has three hydrogen bonds, while the pair A-T has two hydrogen bonds.

8 0
2 years ago
What are some of the specialized cells found in vertebrate animals
White raven [17]
Epithelial, muscle, connective, nerve and blood.
6 0
3 years ago
If you could monitor the activity from the photoreceptors of rods and cones in the retina during a dream, would you expect these
loris [4]

The question is incomplete as it does not have the options which are:

- Yes, because people's eyes move during sleep, and this stimulates the rods and cones.

- No, because rods and cones only convert light energy into electrical signals.

- No, because rods and cones never produce electrical signals.

- Yes, because the rods and cones are reproducing images that are then sent to the brain.

Answer:

No, because rods and cones only convert light energy into electrical signals.

Explanation:

The rod and cone cells are the photoreceptor cells present on the retina of the eye which receives the physical stimulus in the form of light and then converts the light energy into the electrical energy which is sent to the brain.

When we dream, our remains closed and no light is able to enter the eye as a result of which the rods and cones do not send the signals to the brain.

Thus, the selected options are correct.

4 0
3 years ago
What is the force of an object that needs a force 4500N to accelerate it at a rate of 5 m/s
babunello [35]

Answer:

The question is somehow not correct, it suppose to be what is the MASS of an object that needs a force 4500N to accelerate it at a rate of 5 m/s as gotten from another website.

The correct answer is 900kg.

Explanation:

To get the mass of the object use the formula

F=Ma

Where F is force

M is mass

a is acceleration.

F= 4500, M=? a=5m/s

4500= M× 5

M=4500/5

M=900kg

Mass is in kg

8 0
3 years ago
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