According to the latest research, which of the following best describes the first eukaryote?
a. It lacked a nucleus, a mitochondrion, or a chloroplast.
b. It lacked a nucleus, but contained a mitochondrion and a chloroplast.
c. It contained a nucleus and a chloroplast, but not a mitochondrion.
d. It contained a nucleus and a mitochondrion, but not a chloroplast.
e. It contained a nucleus, a mitochondrion, and a chloroplast.
D
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What three factors determine the ecological efficiencies of consumers?
a. assimilation and harvesting efficiencies, and nutrient volume b. assimilation and harvesting efficiencies, and water volume c. production, harvesting, and assimilation efficiencies d. production and harvesting efficiencies, and amount of sunlight e. production and harvesting efficiencies, and percentage of decomposers
Subsidiary cells are the only epidermal cells that have chloroplasts
____________________ Indicate whether the statement is true or false.
Which of these is a component of ribosomes?
A. DNA B. rRNA C. tRNA D. ribosome
During metamorphosis, a tadpoles tail is reduced in size by the process of _____
A) regeneration B) apoptosis C) oxidative phosphorylation D) re-differentiation