A period of mass extinction is often followed by ________
A) explosive diversification
B) paedomorphosis
C) global warming
D) continental drift
A
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Recreational cavers likely introduced ________, which threatens populations of already endangered bat populations in North America.
a. the fungal pathogen that causes white-nose syndrome b. the Limosa harlequin frog c. Batrachochytrium dendrobatidis, which causes the disease chytridiomycosis d. the European green crab
Bryophytes lack vascular tissue and lignin and therefore cannot
A. sexually reproduce. B. grow tall. C. asexually reproduce. D. produce a gametophyte stage. E. produce a sporophyte stage.
Francesco Redi performed the following experiment. He had two different sets of containers with meat in them. One set of containers was covered with a material that let air pass through and the other set was left uncovered. The uncovered containers developed maggots and the covered ones did not. Which one of the following hypotheses could not be tested by this experiment?
A. Maggots come from within the meat. B. Maggots are introduced to the meat from some outside source. C. Only living things can give rise to other living things. D. Air is necessary for living things to be produced.
Which of the following is an example of heterotrophy?
A. Teeth in a lizard's head resemble each other in morphology B. Axolotls grow to full size but do not undergo metamorphosis, so that they retain many juvenile characteristics C. During human postnatal growth, the head grows at a slower rate than the body while the legs grow at a faster rate D. Entire young plants develop on the leaf margins of the Mother of Thousands