Which of the following species can be considered exotic in North America?

a. sea lamprey
b. water hyacinth
c. nutria
d. all of the choices


d

Biology & Microbiology

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An enzyme that attaches a phosphate group to another molecule is called a _______________

A. phosphatase B. phosphorylase C. kinase D. cyclase

Biology & Microbiology

Provide a brief description of the variable gene activity hypothesis as it relates to development. What information is often provided in support of this hypothesis?

What will be an ideal response?

Biology & Microbiology

Steroid hormones typically move across the cell and nuclear membranes to bind to receptors in the nucleus

Indicate whether the statement is true or false

Biology & Microbiology

Several serious fungal infections affect the lower respiratory system mainly because fungi

a) are dimorphic. b) are opportunistic. c) produce airborne spores. d) produce toxic proteins.

Biology & Microbiology