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torisob [31]
3 years ago
11

Which of the following is not an observation or inference on which natural selection is based?

Biology
1 answer:
olga2289 [7]3 years ago
4 0

Answer: B. Poorly adapted individuals never produce offspring

Explanation:

Natural selection is a theory that states organisms adapts to its environment due to differences in their phenotypes. So, <u>individuals with favorable traits are more likely to survive and reproduce</u>. It is a key mechanism of evolution, which is the change in traits of a population over generations.

<u>Populations respond to natural selection if they contain heritable variation </u>among them, wich means that individuals differ in the traits they transmit to their offspring.

Because of the environmental selection pressures, individuals produce more offspring than their environment can support. <u>The pressure determines which individuals will survive and reproduce</u>, while others will die because of predation or diseases. So, natural selection is based on the observations of adapted individuals.

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En coding the phrase " ruptured aneurysm of carotid artery, extracranial portion," the main term to reference in the index is __
gogolik [260]

The main term of reference in the index is  Aneurysm

Extra cranial carotid artery aneurysms ruptures when the blood clots are formed in them.  The term  aneurysms is a disease  that is happening due to the weakness in the wall of artery. The weakened arteries widens out or swells.

3 0
3 years ago
Which of the following is not true concerning the flow of energy through an ecosystem? a. Most solar energy is used in photosynt
sleet_krkn [62]

Answer;

D. Most of the energy from photosynthesis flows out as heat

Explanation;

Energy flow is the amount of energy that moves through a food chain in a given ecosystem.

Producers such as green plants in a ecosystem convert energy from the the sun into carbon bonds, such as those found in the sugar glucose through the process of photosynthesis.

The amount of chemical energy storied as nutrients in the bodies and wastes of organisms flows through ecosystems from one trophic level to the next and through this flow energy also is lost as heat. And the chemical energy available to the succeeding feeding level decreases.

7 0
3 years ago
Read 2 more answers
What is a complete protein?
andrew-mc [135]
A complete protein<span> (or whole protein) is a source of protein that </span>contains<span> an adequate proportion of </span>all nine<span> of the </span>essential amino acids<span> necessary for the dietary needs of </span><span>humans.

Answer: C

Hope this Helps! :3

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6 0
3 years ago
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Nutrition is a broad field that involves the foods you consume, the nutrient content of those foods, and how those foods and the
Marrrta [24]

Answer:

A

Explanation:

The correct option that does not describe the science of nutrition would be <u>that many studies have been conducted on the association between certain types of cancer and diet and, therefore, these links are well-understood</u>.

<em>While truly indeed many studies have been conducted linking certain types of cancer and diet, scientists are far from understanding the link between diets and cancer. While some degrees of understanding exists, it is not 100% certain that there is a cause-effect relationship between these two factors, and a large percentage of cases of cancer are caused by factors that cannot be controlled.</em>

The correct option is, therefore, A.

6 0
2 years ago
A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium. Following incubation, only E.
Burka [1]

Answer:

The culture medium must be selective

Explanation:

Selective media are the media that have those ingredients which favor the growth of a particular bacterium and inhibit the growth of unwanted bacteria. So a selective media is used to selectively grow a particular micro-organism.

For example, MacConkey agar is a selective media that is used to isolate gram-negative enteric bacteria based on lactose fermenting ability. It contains ingredients like bile salt and crystal violet which inhibits the growth of gram-positive bacteria therefore it only allows the growth of gram-negative bacteria.

<em>Staphylococcus</em> <em>epidermidis</em> is a gram-positive bacteria and <em>E.coli</em> is gram-negative enteric bacteria so MacConkey agar can be used to select E.coli over <em>Staphylococcus</em> <em>epidermidis</em>. So the correct answer is the culture media must be selective.

5 0
2 years ago
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