Which members of an ecosystem occupy the first trophic level of a food web?
A. Autotrophs
B. Herbivores
C. Omnivores
D. Carnivores
Ans: A. Autotrophs
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Membrane proteins may function in
A) receiving extracellular signals. B) amphipathic modification. C) temperature control. D) protein manufacture. E) information storage.
The first adult animal to be cloned was a ____
a. sheep b. horse c. goat d. dog e. cat
The wings of birds and insects share similar functions but evolved from different structures; therefore, these wings are said to be
A) homologous. B) biramous. C) uniramous. D) analogous. E) bipedal.
A pathologist who wants to examine a patient's liver cells to determine if the mitochondria have an internal structural defect will likely need to use a
A) light microscope. B) transmission electron microscope. C) scanning electron microscope. D) fluorescence microscope.