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nignag [31]
2 years ago
14

A group of students are walking in the park and one of them takes a picture of a pollen grain that is being blown by the wind. W

hat caption can the student use for this picture?
Biology
2 answers:
bonufazy [111]2 years ago
6 0
Gene Flow at Work will be your answer. <span />
nata0808 [166]2 years ago
4 0
<span>gene mutation in action gene flow at work genetic drift as it happens natural selection in progress.</span>
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How many electrons does calcium have
Veronika [31]

Answer: 20 electrons

8 0
3 years ago
Which process in paramecium results in genetic recombination but no increase in population size?
Gala2k [10]
<span>Conjugation in which two cells temporarily combine in order to transfer genetic materials. After combination they then divide again, allowing of the information to pass and replace the previous members of the population.</span>
4 0
3 years ago
A capsule stain is described as a negative stain because the capsule itself __________. does not take up stain has a negative ch
KonstantinChe [14]

Answer:

Does not take up the stain.

Explanation:

Negative staining refers to the process wherein the unstained specimen is visualized under the darkly stained background.

One of the examples is capsule staining wherein the capsulated cells are stained with India ink or nigrosin dyes. The particles of these dyes stain the background blue-black but cannot enter the capsule.

Hence, the light-colored capsulated cells are visualized in the midst of the blue-black background.

6 0
3 years ago
Bacteria grow in a culture at a rate proportional to the amount present. Initially, 300 strands of the bacteria are in the cultu
OLEGan [10]

Answer:

(a) number of strands (n) = time (t) ÷ proportionality constant (k)

(b) The time needed for the bacterial to double its initial size is 3.36 hours.

Explanation:

(a) Let the rate (time) be represented by t and the amount (number) of strands of bacteria be represented by n

t is proportional to n, therefore, t = kn (k is the proportionality constant)

Since t = kn, then, n = t/k

(b) Initial amount of strands = 300

Amount of strands after 2 hours = 300 + (300 × 20/100) = 300 + 60 = 360

k = t/n = 2/360 = 0.0056 hour/strand

Double of the initial size is 600 (300×2 = 600)

Time (t) needed for the bacterial to double its initial size = kn = 0.0056×600 = 3.36 hours

8 0
3 years ago
Organic substances that are necessary in trace amounts for the normal metabolic functioning of the body are called
masha68 [24]
Vitamin <span>a class of diverse organic substances that occur in many foods in small amounts and are necessary in trace amounts for the normal metabolic functioning of the body</span>
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3 years ago
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