Animal A kills animal D for food; animal C lives in animal D but does not harm D; animal B lives on the surface and sucks blood from D. The animal(s) that is/are a parasite on animal D is/are:
A. A.
B. A and C.
C. B.
D. B and C.
C. B.
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What evidence suggests when oxygen gas first
became a significant part of Earth’s atmosphere?
a. multi-celled microorganisms that breathed oxygen b. fossils of dinosaurs c. molten rock from volcanoes that were rich in oxygen d. rusty rocks indicating oxidized iron e. the presence of water vapor in the atmosphere
The greatest volume of blood is found in the
a. aorta and arteries. b. capillaries. c. veins. d. lungs. e. heart
Can mutation rates evolve in laboratory experiments? Briefly describe an experiment that researchers performed to investigate this, and state whether the mutation rate did evolve, and if so, whether it evolved to become higher or lower
What will be an ideal response?
How do enveloped animal viruses exit their host?
A) Bursting the host cell B) Endocytosis C) Rupturing virus D) Budding or exocytosis