The characteristic long and narrow “pipe-like” sporophyte that emerges from the parent gametophyte is characteristic of which type of seedless plant?
a. liverworts
b. hornworts
c. mosses
d. ferns
b. hornworts
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In emperor penguins, the mother incubates the egg during the Antarctic winter while the father roams in search of food
Indicate whether the statement is true or false
Which of the following is NOT a risk factor associated with cancer?
A. Advanced age B. Smoking cigarettes C. Family history of cancer D. Viral infections E. All of these are risk factors associated with cancer
Which of the following statements is FALSE?
A) Carbon, hydrogen, oxygen, and nitrogen are the most abundant elements of living matter. B) Some naturally occurring elements are toxic to organisms. C) All life requires the same essential elements. D) Iron is needed by all humans.
Plants prevent erosion by
A) supporting animals that consume excess water. B) promoting flooding. C) holding water. D) blocking winds and stabilizing soil with extensive root systems. E) recycling nutrients.