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Viefleur [7K]
3 years ago
6

Do all sperm look alike? What are some differences that sperm cells can have?

Biology
1 answer:
igor_vitrenko [27]3 years ago
3 0

Answer:

The more different the human is between human sperm to the eggs might just look different that every sperm is different because of the way their inherited DNA.

yeh.....

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Drag each label to the correct location.
zysi [14]

Answer:

Explanation:

The high clouds are cirrus,

The middle clouds are cumulus,

And the low clouds is stratus.

Hope this helps :)

8 0
3 years ago
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After arousal by a sensory stimulus, consciousness can be maintained by positive feedback, because of activity in the
KIM [24]

Answer:

This question lacks options, options are:

A) cerebral cortex.

B) basal nuclei.

C) sensory pathways.

D) motor pathways.

E) All of the answers are correct.

The correct answer is E.

Explanation:

The cerebral cortex processes and filters its information before passing the most relevant aspects to other regions of the brain. Some of these brain regions, in turn, send information back to the cortex. These loops, known as 'feedback systems', are considered essential for the functioning of cortical networks and their adaptation to new sensory information. Neural circuits must first assess the importance of incoming sensory information and then refine how it is processed in the future. Positive feedback, triggered with the purpose of amplifying the response to the initial stimulus, can be compared to a chain reaction or a vicious circle. Few are the functions regulated by this mechanism; rather it is triggered in pathological situations. It is the system by means of which the organism very rarely regulates any of the bodily functions under normal conditions, making the initial stimulus to be maintained and even increased. This type of mechanism is predominantly present in pathological situations: Its constitutive elements are: stimulus, receptor, afferent pathway, integrating center, efferent pathway, effector and response. The response does not have the ability to satisfy the initial stimulus.

6 0
3 years ago
Explain the fluid-mosaic model of membranes. how are proteins found at membranes described? what types of side chains would be f
mihalych1998 [28]
He fluid mosaic model of the plasma membrane. The fluid mosaic model of the plasma membrane describes the plasma membrane as a fluid combination of phospholipids, cholesterol, and proteins. Carbohydrates attached to lipids (glycolipids) and to proteins (glycoproteins) extend from the outward-facing surface of the membrane<span>.</span>
7 0
3 years ago
Help please ill give you a crown!
daser333 [38]

Answer:

Proteins

Explanation:

4 0
3 years ago
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Match the correct age in years with its major evolutionary event, as determined by the fossil:EVENTS:1. First prokaryotic cells
solmaris [256]

1.

The first prokaryotic cells (the less complex in its organization and with no organelles involved in membranes) evolved about 3.5 billion years ago. Therefore, the correct answer is D. 3.5 billion.

2.

Then, some prokaryotic cells evolved to use the sunlight to produce energy and release O2 into the atmosphere about 2.8 billion years ago. Therefore, the correct answer is C. 2.8 billion.

3.

After that, the prokaryotic cells evolved to cells with organelles bounded by membranes, and then the eukaryotic cells evolved about 2.5 billion years ago. Therefore, the correct answer is B. 2.1 billion.

4.

A long time after that, aproximately 650 million years, the first life composed of an organism with multiple cells evolved. Therefore, the correct answer is A. 650 million.

5 0
1 year ago
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