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zhenek [66]
3 years ago
12

Which molecule crosses the plasma membrane by diffusion?

Biology
1 answer:
SpyIntel [72]3 years ago
5 0
This answer would be all of the above
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At room temperature an element is a
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the answer is b) liquid or gas

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if 144 million cars are use in United States each day how many pounds of carbon dioxide are released into the air each week
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How much carbon dioxide would a car release in one day?
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Why is it important to center the object you want to look at in your field of view before changing to a higher magnification obj
Lesechka [4]

Answer:

B. So you can always see the entire object at the higher magnification

Explanation:

A microscope is used to view objects smaller than the naked or unaided eyes can see. The objective lens, in conjunction with the occular or eye lens, is used to achieve this purpose. The objective lens are of different magnifications as follows: 10X, 40X, 100X etc.

However, as the magnification increases i.e. higher objective, the object in the field of view becomes smaller and less focused. Hence, the object in the field of view must first be centered at a lower magnification/objective lens before changing to a higher one in order for the entire object to be seen at a higher magnification.

5 0
3 years ago
When plants make flowers, gene A is expressedin whorls 1 and 2, gene B is expressed in whorls 2 and 3 and gene C in whorls 3 and
Sati [7]

Answer:

The correct answer would be option D) no gametes.

Explanation:

The ABC model of the flower was formulated to describe the collection of genetic procedures that determines floral organs in several plants. These species consist of four whorls which are sepals, petals, stamens, and carpels. These whorls are expressed by the expression of a number of genes present in each whorl or verticli.

Gene A is solely responsible for the sepals while the co-expression of A and B genes are responsible for the petals. The identity of the stamens is expressed by B and C and the carpels require C and D genes to be active.

The homozygousity for a normal mutation in gene C will lead to inactive or lack stamens and carpels, which are male and female reproductive organs. These are an important structure for forming gametes.

Thus, the correct answer would be option D) no gametes.

3 0
3 years ago
Aiding in emotional processing and arousal functions are functions of the __________. A. Thalamus B. Hypothalamus C. Cerebrum D.
Liono4ka [1.6K]

Answer:

A. Thalamus

Explanation:

There are two large ovoid organs called the thalamus, which form most of the lateral walls of the third ventricle of the brain. A variety of receptors transmit signals from the thalamus to the cerebral cortex. Thalamus is anatomically situated adjacent to the midline third ventricle in the brain.

5 0
2 years ago
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