Answer:
(1) they keep toxic substances out of the cell.
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles
Answer:
The correct answer is organisms that have extreme traits. Explanation: Disruptive selection is a specific type of natural selection that describes changes in population genetics. In disruptive selection, both extreme values for a trait are favored over intermediate values.
Explanation:
A single-celled prokaryotic organism that is generally free-living and of few micrometers in length is bacteria. They are very small in size that cannot be seen without a microscope.
bacteria will be present in 100 milliliters of water.
<h3>How to calculate the number of bacteria?</h3>
Given,
- 1 milliliter = 1,500,000 bacteria
- 100 milliliter = ?
Therefore, option E is correct.
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The ability to sustain aerobic activity for a prolonged period of time is known as cardiorespiratory fitness.
Cardiorespiratory fitness or endurance refers to the ability of the circulatory as well as respiratory systems of the body to provide fuel or power during sustained aerobic activity.
In order to enhance one's cardiorespiratory fitness, physical activities which maintain heart rate elevations at a safe level for a sustained length of time, like walking, running, cycling, etc. need to be attempted.
The cardiorespiratory fitness is linked with the functioning of heart, lungs as well as blood vessels. However, one should slowly increase the pace when performing such activities.
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