In what scenario would a cell want to "ramp up" the expression of a particular gene? a. When a person faces an infection that requires the immune system to rapidly respond with antibodies
b. When a cell differentiates to become a specialized blood cell
c. After an organism consumes a large meal and more digestive enzymes are needed for digestion
d. All of the above

B

Explanation:

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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.