For a stem that has a vascular cylinder, which sequence of structures is in the correct order, from outside to inside?

a. stele ? epidermis ? pith ? cortex
b. epidermis ? cortex ? stele ? pith
c. stele ? cortex ? epidermis ? pith
d. cortex ? stele ? pith ? epidermis


Answer: b. epidermis ? cortex ? stele ? pith

Biology & Microbiology

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Insects are likely so successful because of which adaptations that allow them to live in a wide range of habitats? Select all that apply

A. desiccation-resistant eggs B. wings C. metamorphosis D. diverse feeding appendanges E. unique respiratory system of spiracles and tracheae

Biology & Microbiology

Why is it critical that the K+ channel activation gate responds slightly more slowly to depolarization than the Na+ channel activation gate?

A. If they showed identical response times, movements of Na+ and K+ ions would cancel out each other's effects on membrane potential changes. B. If they showed identical response times, movements of Na+ and K+ ions would magnify each other's effects on membrane potential changes, creating dangerously large action potentials. C. It is not critical and there would be no change in action potential characteristics if this difference in response time did not exist.

Biology & Microbiology

The correlation coefficient for unrelated people is ____________________.Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

List the similarities and differences between prokaryotic and eukaryotic cells. Identify three ways that these

differences impact cell function. What will be an ideal response?

Biology & Microbiology