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MakcuM [25]
3 years ago
15

Dendritic cells and macrophages kill by ingestion and destruction of particulate matter in a process called phagocytosis. Dendri

tic cells and macrophages kill by ingestion and destruction of particulate matter in a process called phagocytosis. True False
Biology
1 answer:
Korvikt [17]3 years ago
6 0

Answer:

The statement is true

Explanation:

Hematopoietic stem cells give rise to myeloid progenitor and lymphoid progenitor and these two progenitors give rise to many immune cells. Dendritic cells are produced by both the progenitors and macrophages are produced by myeloid progenitor.

Both macrophages and dendritic cells are phagocytes. In phagocytosis, the foreing particles are injected by these phagocytes and they are destryoyed by the action of digestive enzymes present in these phagocytic cells.  

Macrophages are present in tissue and if they are present in blood they are called monocytes. Therefore the statement is true.

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2. In sheep black wool is recessive to white wool. What happens when you mate a black ram (male) to a heterozygous ewe (female).
sveta [45]

Answer:

50% will be white (Ww) and 50% will be black (ww)

Explanation:

Here's what the punnett square should look like.

In order for the black ram to have its coloring it would need to have 2 recessive genes (ww). The female is heterozygous, meaning she carries both genes (Ww) but only exhibits the dominant gene, in this case white fur (though they can pass the recessive gene on to their children). Simply filling out the punnett squares shows the outcome of the offspring.

6 0
3 years ago
A red rose bush cross pollinates a white rose bush. The offspring have white flowers with red
Nadusha1986 [10]

Answer: 50%

Explanation: In certain rose plants, white roses and red roses are incompletely dominant to one another. When a red rose is crossed with a white rose, a pink rose will result. What is the probability of producing more pink roses from two pink parents?

8 0
3 years ago
The change in genetic composition of a population over time is called
xenn [34]
The answer is microevolution
4 0
3 years ago
A laboratory experiment requires 250 milliliters of water for boiling. It also requires 100 milliliters ofw
lakkis [162]

Answer:

550 milliliters of water is needed.

Explanation:

the student will need 550 milliliters of water for completing the whole experiment. 250 milliliters of water is needed for  boiling purpose while on the other hand, 100 milliliters of water is needed for one process which can be repeated three times so the process needs 300 milliliters of water so by combining the 250 milliliters and 300 550 milliliters of water we get 550 milliliters of water for the whole experiment so we can say that the student needs 550 milliliters of water for the experiment.

5 0
3 years ago
________ thousands of tiny projections that add even more surface area to villi​
victus00 [196]

Answer:

Each villus, in turn, has thousands of even smaller projections called microvilli (singular: microvillus).

Explanation:

The villi contain capillaries, which are tiny blood vessels. Nutrients are absorbed into these capillaries across the surfaces of the villi and microvilli. Because there are millions of these tiny projections, they greatly increase the surface area for absorption.

6 0
3 years ago
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