Why is genetic variation necessary for natural selection to occur?

Environmental science, check my answers? 1. Most familiar life forms live in regions of biomes that humans inhabit. True < False 2. Biodiversity is the variety of life forms that exist or existed in the past. True < False 3.

Which statement is true for both photosynthesis and cellular respiration? It occurs in consumers. It occurs in producers. It produces carbon dioxide. It produces oxygen.

What does it mean if a person has o blood?

Spoon-shaped, quill-shaped, spider-like, and thread-like flowers all describe varieties of A. gerbera. B. daffodils. C. chrysanthemums. D. lisianthus.

How do organisms contribute to the carbon cycle? A. through metabolic processes B. through the diffusion of hydrogen ions C. by reflecting light D. by splitting water molecules

Why is it necessary to do a spinal tap when you suspect a bacterial infection of the central nervous system? why can't you use a blood test?

Name the major greenhouse gasses and how they get into the atmosphere

Which type of cell goes through the determination process?

What organic molecule is the basis of enzymes.?

Which transport mechanisms require the formation of a vesicles to transport material into or out of the cell? A: diffusion and osmosis B: exocytosis and calcium pumps C: exocytosis and endocytosis D: diffusion and facilitated diffusion