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beks73 [17]
3 years ago
9

Natural selection can be compared with the process of passing a gravel-mix through a sorting machine, and getting separate piles

of gravel, each with its own pebble size. In this analogy, which part of natural selection is represented best by the gravel mix?a. Over-reproduction b. Struggle for existence c. Variation d. The environment
Biology
1 answer:
Aleonysh [2.5K]3 years ago
8 0

Answer:

The correct answer is option c, that is, variation.

Explanation:

In the given case, the gravel mix is to be selected on the basis of the size of pebbles, which is analogous to the organism selected in nature. In the given question, the sorting machine is analogous to the environment, that is, a selective force.  

Like a specific environment permits the organisms exhibiting specific traits. For example, in a desert where the environment is hot and dry, only the species exhibiting the tendency to conserve water can thrive, similarly sorting machine will permit to distinguish gravel on the basis of the pebble size. Thus, different size of pebble resembles variation.  

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Charra [1.4K]

Answer:

There is an increase in demand for higher quality and quantity of food and other products.

Explanation:

There is an increase in demand for higher quality and quantity of food and other products. So, there is a huge requirement for technological innovation.  Investment is needed in research and development to develop crops that are pesticide-free, resistant to disease, and able to face various weather conditions.  Vertical farming and carbon-capture technology can be used to meet growing world food demands.

3 0
3 years ago
How do plate tectonics explain the formation and metamorphic rocks?
Serga [27]

Metamorphic rocks are formed from other rock that has been subjected to very high temperature and pressure.

When one of the earth's plates comes in contact with another either by both traveling opposite directions, straight into each other, or from one slipping under the other (subduction zone), the pressure/friction of the plates against each other melts the rocks and after they cool they are metamorphic. Example is in Washington state when the Juan de fuca plate is going under the North American plate the pressure/friction of this melts the rocks which then form metmorphic rock.

4 0
3 years ago
Plz answer this question I am a little confused
Step2247 [10]
I think it would be D
5 0
3 years ago
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Which of the following statements is true? Organisms in the Archae kingdom are multicellular eukaryotes. Organisms in the Planta
Papessa [141]

Answer:

A.

Explanation:

6 0
3 years ago
Please help me answer at least one?<br>​
LenKa [72]

Answer:

1. Explain why predators need to eat more than primary consumers.  

Explanation:

Predators need to eat more than primary consumers because in the trophic pyramid, primary consumers are at the bottom which means they receive the most energy because they eat the plants. As the pyramid goes on upwards, energy is lost each time, so that means by the time it reaches the top of the pyramid their is only about 0.1% of the energy we started with when the primary consumers ate the producers. Meaning, the predators need to eat more than the primary consumers because although the predators eat more than the primary consumers, they still at the end of the day get the same amount of energy just one eats more than another.  

8 0
1 year ago
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