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bazaltina [42]
3 years ago
13

The cells responsible for humoral immunity are the ________ cells.

Biology
1 answer:
Viefleur [7K]3 years ago
4 0
The answer is B cells. They are part of the adaptive immune response following an immune attack. They produce antibodies (immunoglobulins) that target particular epitopes and antigens. This is especially true for the memory B cells that can identify an antigen they've engaged before and produce, very fast, antibody response against the antigen.
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Explain your observations. What did you observe as you added phenolphthalein to the ammonia solution? What did you observe when
Bess [88]

Answer:

Liquid ammonia is liquefied ammonia and is basic in nature. It dissolves in water to give ammonium hydroxide which ionizes to give hydroxyl ions. Therefore it turns red litmus blue and phenolphthalein solution pink.

6 0
2 years ago
Joel is comparing two slides showing chromosomes in a sperm cell and a skin cell of a dog. He finds that the sperm cell has 39 c
leonid [27]
Using the concept that :
<span>The skin cell has twice the number of chromosomes as the sperm cell has.
</span>Hence,
<span>The sperm cell has 39 chromosomes.
The skin Cell will have = 39 x 2
                                    = 78 </span><span>chromosomes.</span>
8 0
3 years ago
Read 2 more answers
Which of these is a disadvantage of multicellular organisms?
Alexxandr [17]

Multi cellular organisms are composed of many cells whereas unicellular organisms are composed of single cell. Multicellularity is indeed a progressive attribute of evolution where cells form tissue which forms organ and then organ system and finally an organism. Both multi cellular and unicellular organisms has advantages and disadvantages of their own. One of the main disadvantage of multi cellular organisms is that due to such a complex composition and functioning they require a large amount of energy for their maintenance and survival. Different organs and system require a huge amount of energy when it comes to comparison with unicellular organisms. A large amount of energy is also wasted in all these life processes. Though multi cellular organisms can survive in a variety of environmental conditions but then also their survival is difficult than any unicellular organism.

4 0
2 years ago
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"refined carbohydrates are digested __________, leading to a ________ rise in blood glucose levels."
Sedaia [141]
Refined carbohydrates are digested faster, leading to a fast rise in blood glucose levels.

Refined carbohydrates have a higher glycemic index than processed whole grains. That's because of their simple chemical structure, leading to powerful spikes in blood sugar and insulin secretion. This immediate impact can lead to an increased risk for type 2 diabetes, overweight and heart disease.






3 0
2 years ago
How does the density of liquid water compare with the<br> density of ice?
Orlov [11]

Answer:

The normal pattern for most compounds is that as the temperature of the liquid increases, the density decreases as the molecules spread out from each other. ... The ice structure takes up more volume than the liquid water molecules, hence ice is less dense than liquid water.

4 0
3 years ago
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