Whisk ferns, club mosses, and horsetails have all the following characteristics in common with ferns except
A. all of these plants are seedless tracheophyte plants.
B. all of these plants produce flagellated sperm.
C. all of these plants form antheridia and archegonia.
D. all of these plants require free water for the process of fertilization to occur.
E. all of these plants have no vascular tissue.
E. all of these plants have no vascular tissue.
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Which of the following represents a mechanism of genetic transfer in bacteria?
A. Transformation B. Transduction C. Conjugation D. All of the answers are correct
Animals such as hydras and jellies can exchange gases directly with the environment by ________
A) diffusion B) active transport C) osmosis D) bulk transport
Which nitrogen-phosphorous-potassium ratio in a fertilizer would most likely solve the problem of yellowed leaves and stunted growth?
A) 20:0:0 B) 0:20:0 C) 0:0:20 D) 0:20:20
Which of the following organisms would MOST likely be sensitive to natural penicillin?
A) helminths B) Streptococcus pyogenes C) penicillinase-producing Neisseria gonorrhoeae D) Penicillium E) Mycoplasma