The mitochondrion
a. has its own DNA.
b. DNA has few noncoding regions between
genes..
c. resembles bacteria in size..
d. resembles bacteria in structure..
e. is all of these.
Answer: e
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Work by Charles Darwin and Francis Darwin was instrumental in the discovery of ____
a. auxins b. brassinosteroids c. jasmonates d. cytokinins e. gibberellins
Impulses are received by nerve cells through
a. an axon. b. any process that is long enough to reach the receptor. c. numerous dendrites. d. the intervention of the neuroglia. e. chondrocytes.
Which of the following is not an example of microbial antagonism or competitive exclusion?
A) microbes producing vitamins and growth factors that can be utilized by the host B) microbes producing acidic compounds that limit the growth of many bacteria C) microbes utilizing oxygen necessary for the growth of other microbes D) microbes competing with other microbes for nutrients E) microbes producing compounds inhibitory to other microbes
________ cells provide support for plant organs where secondary growth has not yet occurred.
A. Sclerenchyma B. Meristem C. Parenchyma D. Collenchyma