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Masteriza [31]
3 years ago
6

Lymphocytes generated during an initial infection that circulate in the body for years and quickly destroy that infection if it

ever appears again are called ______ cells.
Biology
1 answer:
Grace [21]3 years ago
7 0
Lymphocytes generated during an initial infection that circulate in the body for years and quickly destroy that infection if it ever appears again are called the Memory t cells.  These cells are a subset of infection that have previously encountered and responded to their respective antigen, thus they may be called the antigen experienced t cells.
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What is the definition of pigment in biology?
choli [55]

NOUN

the natural coloring matter of animal or plant tissue.

VERB

(pigmented)

color (something) with or as if with pigment.

"pigmented areas such as freckles"


3 0
3 years ago
In an investigation, plant cells are placed in water that has been tinted blue. The investigators observe the color of the cells
larisa [96]

Answer:

C

Explanation:

When plant cells take in water, the vacuole swells. A swollen vacuole indicates the plant cell has all the water it needs. This suggests that the plant is taking in water and is maintaining optimum conditions. This is an example of homeostasis.

If the cells burst apart, as in A and E, this would suggest the cell is not properly maintaining homeostasis, as the cell bursting suggests something has gone badly wrong. This suggests the cell has taken in too much water; the cell has not been able to maintain homeostasis and regulate water uptake to prevent this from happening.

In the reverse case, where the cells shrink apart (as in B), the cell would also not be properly maintaining homeostasis by failing to bring enough water into the cell to maintain a turgid state. This is also damaging for the cells.

Finally, D and E can also not be correct, because water can cross the cell membrane, and does not need to be pumped in or sent out by endocytosis.

8 0
3 years ago
THE MENSTERUAL CYCLE <br><br> Fill in the missing blanks
IrinaVladis [17]
1) 28 2) ovaries 3) fallopian tube 4) ovaries 5 & 6) ovary 7) ovulation 8 & 9) uterus 10) fallopian tube 11) sperm cell 12) uterus 13) fertilized 14) blood 15) uterine 16) vagina 17) 28 18) menstruation
3 0
3 years ago
The fossil record indicates that the earliest hominids most likely originated on which continent?
Brums [2.3K]
The fossil record indicates that the earliest hominids most likely originated in "Africa," since this is the location from which humans eventually migrated to other locations.
7 0
3 years ago
Why are colonial organisms not truly multicellular?​
Alborosie

Answer:

Colonial Organisms

The difference between a multicellular organism and a colonial organism is that the individual organisms that form a colony or biofilm can, if separated, survive on their own, while cells from a multicellular organism (e.g., liver cells) cannot. This enables the colony to swim towards the light.

Explanation:

All based on research.

3 0
2 years ago
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