__________ results in an early embryo that has two or three primary tissue layers. Fill in the blank(s) with the appropriate word(s)
Gastrulation
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During an infection, lymph nodes swell because ________ cells accumulate inside them
a. natural killer (NK) cells b. B c. T d. mast
Fungi are heterotrophs that feed off decaying matter. What is the term for this type of feeder?
a. saprobes b. mycophytes c. caprophiles d. chemolithotrophs
In a market economy, a supply restriction occurs when a single firm monopolizes a market
a. true b. false
Earth is generally hotter at the equator because:
A) the sun shines over the equator evenly through the year, rather than seasonally. B) Earth's rotation on a tilted axis creates an atmospheric drag at the equator, warming the air. C) the Earth receives the most direct sunlight over the course of the year at the equator. D) Earth's rotation on a tilted axis increases seasonality. E) the natural oval shape of Earth places the equator nearer the sun than the poles.