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Ymorist [56]
1 year ago
11

A student prepared a slide of pollen grains from a flower. First the pollen was viewed through the low-power objective lens and

then, without moving the slide, viewed through the highpower objective lens of a compound light microscope.
Which statement best describes the relative number and appearance of the pollen grains observed using these two objectives?
(1) low power: 25 small pollen grains
high power: 100 large pollen grains
(2) low power: 100 small pollen grains
high power: 25 large pollen grains
(3) low power: 25 large pollen grains
high power: 100 small pollen grains
(4) low power: 100 large pollen grains
high power: 25 small pollen grains
Biology
1 answer:
bearhunter [10]1 year ago
3 0

Answer:

(2) low power: 100 small pollen grains

high power: 25 large pollen grains

Explanation:

Compound light microscopes are devices used to greatly magnify objects. They have several objective lenses, a low-power lens magnifies 10 times (10X) the objects, and the high-power lens magnifies them 40 times (40X).

For that reason, when observing the pollen grains with the high-power lens the student will see them bigger than with the low-power lens. However, the field of view (the visible area through a lens) is reduced when a higher power lens is used, so fewer pollen grains will be seen.

The answer therefore is the option of higher number of pollen grains of small size for the low-power lens, and lower number of pollen grains of larger size for the high-power lens.

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Answer:

The correct option is D. The average mass of plants exposed to 3 g of herbicide was 10g.

Explanation:

As the vertical axis is labelled as average plant mass, it will make the y- coordinate.

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The coordinates for the given value are (3,10). 3 will be the value of the x- coordinate. Hence, it will show the average mass of the plant at the plotted point which will be 3 g.

10 will show the value of the y- coordinate which will be the amount of herbicide given to the plant.

Hence, Dis the correct option.

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2 years ago
A simple apparatus used to show the process of osmosis is an​
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2 years ago
Water is essential for survival. It is important to understand the factors that affect water balance and the best sources to hel
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Explanation:

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8 0
1 year ago
Read 2 more answers
Determine the new concentration, in mg/mL, of the starch solution you diluted in the Erlenmeyer flask. Recall from the Procedure
Semmy [17]

Answer:

0.05 mg/mL  ( B )

Explanation:

Given data:

20 mg/ml starch

2% solution = 2g of solute is in 100g of solvent

<u>Determine the new concentration in mg/ml </u>

Dilution equation = C1V1 = C2V2

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∴ new concentration = 0.00005 g / 1 mL * ( 1000 mg / 1g ) = 0.05 mg/mL

6 0
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