Endosperm has allowed the angiosperms to become the most numerous and diverse plant group. What is the role of the endosperm?
A) It provides nutrition for the developing embryo, therefore increasing survival rates.
B) It is the hard outer seed coat that protects the embryo.
C) It ejects and disperses seeds after they mature.
D) It is the ripened ovary tissue involved in seed dispersal and protection.
E) It is a type of male gamete.
A
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One reason plants often do not survive indoors is because they lack adequate amounts of:
A. water B. minerals C. light D. proper temperature E. All of these could be true
Karl Popper suggested that scientists use "imaginative preconception," which means that successful scientists:
A. do not keep records of experiments that fail. B. do not need to do experiments to test their ideas. C. only perform applied research. D. often predict the outcome of experiments. E. cannot predict the outcome of experiments.
Differences in domesticated animals over relatively short periods of time most likely occur through
A. natural selection B. experimental selection C. artificial selection D. adaptation E. evolution
A patient has a suspicious skin infection and a culture is taken. Which media would be appropriate to select for staphylococci?
A) Chocolate agar B) Nutrient agar C) Mannitol salt agar D) Blood agar E) macConkey agar