In a mature tree, the point where the bark can be peeled off the wood is where the ________ lies.

A. vascular cambium
B. cork cambium
C. periderm
D. secondary xylem


Answer: A

Biology & Microbiology

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Some green algae exhibit alternation of generations. All land plants exhibit alternation of generations. No charophytes (stoneworts) exhibit alternation of generations

Keeping in mind the recent evidence from molecular systematics, the correct interpretation of these observations is that _____. A) charophytes are not related to either green algae or land plants B) plants evolved alternation of generations independently of charophytes C) alternation of generations cannot be beneficial to charophytes D) land plants evolved directly from the green algae that perform alternation of generations E) scientists have no evidence to indicate whether or not land plants evolved from any kind of alga

Biology & Microbiology

In the third stage of aerobic respiration, _____ is the final acceptor of electrons

a. water c. oxygen b. hydrogen d. NADH

Biology & Microbiology

Define and put these terms in order from smallest to largest (in size): organ, tissue, cell, organ system

What will be an ideal response?

Biology & Microbiology

Among the following substances contaminating Aberdeen Proving Ground in Maryland, which is an organic compound

that damages the nervous system, liver, and lungs?

a. lead b. arsenic c. dimethyl chloride d. trichloroethylene e. mercury

Biology & Microbiology