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MatroZZZ [7]
3 years ago
10

True or false? B cells were originally isolated from the bursa in chickens

Biology
1 answer:
Maru [420]3 years ago
7 0

Answer:

True

Explanation:

B cells are B lymphocytes and are one of the types of white blood cells. Their main role is in the acquired immune system in which they help in the humoral immune response of the body by the secretion of antibodies. The maturation of the B cells occurs in the bone marrow in mammals. But in birds, these cells mature in an organ named bursa of Fabricius which is a lymphoid organ in birds. These B cells were first isolated form the bursa of Fabricius of the birds.

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podryga [215]

Among the following the benefit of using agroforestry in a tropical rain-forest climate is that growing trees provides a boost in crop output for a short time.

Answer: Option A

<u>Explanation:</u>

Agroforestry is a kind of practice in which trees are grown along with the crop which benefits the crop; there is different alley cropping, silvopasture and forest cropping.

Combining forests and agriculture seem to perform many benefits to the farmer. This type of practice has enabled farmers to show nutrient cycling, crop productivity and change in the micro climate of the place.

8 0
3 years ago
Read 2 more answers
List the two types of fermentation AND tell where each takes place.
FromTheMoon [43]

Answer:

There are two types of fermentation, alcoholic and lactic acid. Fermentation follows glycolysis in the absence of oxygen. Alcoholic fermentation produces ethanol, carbon dioxide, and NAD+. Lactic acid fermentation produces lactic acid (lactate) and NAD+.

Explanation:

4 0
3 years ago
Read 2 more answers
The crossing of a hybrid and a dominant purebred will always result in offspring which are what?
inn [45]

Answer:

Dominant

Explanation:

A hybrid trait is also known as heterozygous, which is the combination of the dominant and recessive alleles of a gene. On the other hand, a purebred is combination of the same two dominant alleles or the same two recessive alleles. For example, in the gene coding for height, allele for tallness (T) is dominant over the allele for shortness (t).

A purebred for this trait will either be "TT" or "tt" while a heterozygous or hybrid will be Tt. Hence, according to this question, crossing of a hybrid (Tt) and a dominant purebred (TT) will always result in offspring which are DOMINANT (see attached image).

6 0
2 years ago
Choose three parts of the cell theory and describe how they apply to both unicellular and
sweet-ann [11.9K]
All things are made of cells (both algae and daisies are made of cells)

All cells come from pre-existing cells (both bacteria and horse cells had cells that made their cells)

Cells are the smallest unit of life (nothing is smaller than cells not grass cells or fungi cells)
5 0
3 years ago
About half of all babies are able to walk independently by __________ months of age.
Liono4ka [1.6K]
I think that about half of all babies are able to walk independently by 12 month of age. It said that babies tend to take their first steps from the age of 9. Babies usually start to crawl before they can walk. This is because their arm are usually more effective. After crawling they learn to stand up with their feet first and later learn to walk while holding things. The next step after that is walking. 
Not all babies walk at the same time. There those that learn before the other so there is no need to worry if your child does not walk by 12 months.
7 0
3 years ago
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