The species concept that relies most heavily on the criterion that species are evolutionarily independent units that are isolated by gene flow is ________
A) the morphospecies concept
B) the phylogenetic species concept
C) the biological species concept
D) This criterion is common to all of these concepts.
D
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Blood with substances from the small intestine
goes through the ___ before returning to the heart.
a. liver b. gallbladder c. pancreas d. large intestine e. spleen
In multicelled species, spores germinate and give rise
to filaments called __________. Fill in the blank(s) with the appropriate word(s).
Which of the following is a result of an incomplete dominance?
a. orange carnations b. white carnations c. pink carnations d. red carnations
If photosynthesis produces cellular energy (ATP) from sunlight, why do plant cells also need to perform cellular respiration, a process that produces ATP from sugar?
a. Plant cells cannot make cellular energy at night; therefore, photosynthesis actually stores ATP energy as sugar, which can be then converted back to ATP at night by cellular respiration. b. Plant cells cannot make enough ATP from sunlight in photosynthesis; they need to perform cellular respiration too in order to make up the difference. c. Plant cells need cellular respiration to convert the sugars they absorb through their roots into ATP. d. Plant cells can't produce enough sugar from photosynthesis; cellular respiration is needed to produce the remaining sugar. e. Plant cells need cellular respiration to degrade the toxic products made in photosynthesis