Which of the following elements is considered an essential macronutrient for plants?

a. zinc
b. uranium
c. iron
d. nickel
e. carbon


E

Biology & Microbiology

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Bacteria are grown in 15N (heavy) medium and then transferred to 14N (light) medium and allowed to replicate for 1 generation. The DNA is subsequently isolated and centrifuged in a CsCl2 gradient to yield what type of gradient band(s)?

A. one heavy band B. one light band C. one half-heavy (intermediate to heavy and light) band D. one heavy and one half-heavy band E. one heavy and one light band

Biology & Microbiology

The communication point between two

neurons is called the

a. electrical synapse. b. chemical synapse. c. neural junction. d. neural bridge. e. interneuron

Biology & Microbiology

Which of the following animals has a coelom?

a. flatworm b. earthworm c. human d. earthworms and flatworms e. humans and earthworms

Biology & Microbiology

Males with Klinefelter syndrome lack a Barr Body

_______________ Indicate whether the statement is true or false.

Biology & Microbiology