Aspecimen collection a scientist do research by:
a. assembling a large number of samples for comparison
o
o
b. summarizing the results of another scientist's investigation
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c providing a way to afford even the most expensive instrument.
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d. creating a realistic depiction of an imaginary undersea world,

The correct option is A) assembling a large number of samples for comparison.

Explanation:

A specimen can be described as a sample of anything which is used for scientific or biological researches. For example, a sample of blood withdrawn from a person to perform various tests.

Specimens can be collected and stored  and they help scientists by comparing the results of different treatments which they apply to the specimens. Hence, option A is correct.

Other options like Option C are not correct because a specimen has nothing to do with making expensive instruments reliable.

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what the squwock

explanation:

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.