Plants control the diffusion of water vapor and gases across the epidermis by means of ____

a. xylem
b. phloem
c. periderm
d. companion cells
e. stomata


ANSWER: e

Biology & Microbiology

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In humans, body size, muscle mass, and patterns of fat distribution are types of ____ sex characteristics

a. primary b. secondary c. tertiary d. initial e. mutable

Biology & Microbiology

Which of the following disorders does not involve faulty DNA repair?

A) Xeroderma pigmentosum B) Trichothiodystrophy C) Ataxia telangiectasis D) Becker muscular dystrophy

Biology & Microbiology

The ____ is responsible for making the lipids that form the cell’s membranes

a. rough ER b. smooth ER c. Golgi body d. peroxisomes e. mitochondria

Biology & Microbiology

When would monozygotic (identical) twins be produced?

A) One sperm fertilizes two different eggs. B) One egg is fertilized by two different sperm. C) One embryo splits into two embryos. D) Two different sperm fertilize two different eggs.

Biology & Microbiology