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Bezzdna [24]
3 years ago
13

Which type of immunity is long lasting and why?

Biology
1 answer:
slega [8]3 years ago
7 0
You are likely referring to active immunity that can come from naturally acquiring the disease or vaccines. Both have T cells that fight pathogens and more antibodies are created to recognize viruses and the like and neutralize them. B cells can make more antibodies. There is a lot more detail to this question but hope it helps. Have a good day.
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Elements combine to form _____. compounds mixtures atoms molecules
-BARSIC- [3]

Answer: i think is chemical is correct answer

3 0
3 years ago
The motion of lipid molecules in a synthetic bilayer can be studied by various techniques. Which of the following has been obser
aliya0001 [1]

Answer:

Option C . Flip-flops are very rare for phospholipids.

Explanation:

Flip-flop means that movement of phospholipds upside down. This phenomenon occur in cell membrane but very rarely. I have attached a picture for you to under stand how flip-flopping occurred.

4 0
3 years ago
A biology teacher wants students to remember the various components of a cell (nucleus, cytoplasm, cell membrane). Considering w
Ann [662]

Answer:

Considering what research tells us about encoding and retrieval, the teacher would be well advised to help students encode information about the cell <em>in both visual and verbal forms.</em>

Explanation:

Psychological studies have shown that images are able to generate better memories in a person. Anything which is learned through images will be remembered  by the human brain for a longer period of time.Also, anything which is learned from a language which the brain interprets is known to generate memories. Hence, both visual and verbal forms of learning would help the students to learn components of a cell.

4 0
3 years ago
A plant breeder has determined the following variances for yield of corn in his fields:
Law Incorporation [45]

Answer:

A. VG = 80

B. Broad sense heritability = 0.80

C. Narrow sense heritability = 0.30

D. Average yield = 430 Units

Explanation:

A. Given that

VA = 30

VD = 50

VI = assumed not available

Therefore

Total genetic variance (VG) = VA + VD

= 30 + 50

= 80

VG = 80

B. Given that

VP = 100

VG = 80

Broad sense heritability, H2 = VG/VP

= 80/100

= 0.80

C. Given that

VA = 30

VP = 100

Narrow sense heritability, h2 = VA/VP

=30/100

= 0.30

D. The difference in selection = 500 - 400

= 100

Recall,

Selection response is heritability multiplied by selection differential.

That is

R = h2S

Selection differential = 100

Heritability h2 = 0.30

Selection response = 0.30 × 100

= 30units

Therefore, expected average yield = 400 + 30

= 430 Units

6 0
3 years ago
What is the main difference between exocrine and endocrine glands?
nignag [31]
<span>The correct answer is a. Exocrine glands secrete substances through a duct; endocrine glands release substances into the blood.</span>
For example, exocrine glands are sweat, salivary, mammary, lacrimal glands… Endocrine glands excrete hormones. Examples of this type of glands are the pineal gland, pituitary gland, thyroid gland, parathyroid gland, pancreas, ovaries, testes, hypothalamus and adrenal glands.    

<span> </span>

6 0
3 years ago
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