The trace amounts of micronutrients needed by microorganisms are usually supplied as inadvertent contaminants in water and regular media components.
Answer the following statement true (T) or false (F)
True
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Select the features that are lacking in amphibians but present in reptiles and that confer an advantage to reptiles for living on land.
_____ egg with an amnion, yolk sac, allantois, chorion, and shell _____ skin resistant to water loss _____ breathing by buccal pumping _____ ability to concentrate urine
Reptiles can maintain their internal body temperature by
A. behavioral mechanisms. B. drinking warm or cool water. C. eating and oxidizing more food. D. an effective insulating covering. E. rerouting blood to distribute heat.
Proteins that are destined to become associated with the inner surface of the plasma membrane are:a
manufactured in the same way as protein hormones. b. manufactured in the same way as proteins destined to become external peripheral proteins. c. made on free ribosomes in the cytoplasm. d. made on ribosomes located on the rough endoplasmic reticulum. e. transported to the plasma membrane within a secretory vesicle
Which of the following statements about transgenic plants is CORRECT?
a) Transgenic plants require many years to be produced. b) Intermediate species are required for transgenic plants to be produced. c) Transgenic plants have been shown to have no detrimental effect on the environment. d) Transgenic plants contain genes from more than one species. e) Transgenic plants have been used successfully for insect resistance but not herbicide resistance.