The host provides environment. Microorganisms feed on undigested food. Host feeds on digested food by microorganism. This relationship is known as:
A. mutualism
B. Disease
C. Colonization
D. Commensalism
E. Parasitism
Ans: A. mutualism
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___________, such as sea stars, are invertebrate members of the deuterostome lineage. Fill in the blank(s) with the appropriate word(s)
The symplast connects of the interconnected cell walls
____________________ Indicate whether the statement is true or false.
Which one of the following occurs when bright light hits the eye?
A) The muscle arranged circularly around the iris relaxes. B) The pupil dilates. C) The photoreceptors no longer respond to the light. D) The pupil decreases in size. E) The muscle arranged radially around the iris contracts.
Cholesterol, testosterone, and estrogen are examples of
A) fatty acids. B) steroids. C) proteins. D) waxes. E) nucleic acids.