A food chain always begins with
A. sympathetic decomposers.
B. photosynthetic autotrophs.
C. pathetic instructors.
D. heterotrophic consumers.
B. photosynthetic autotrophs.
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What will be an ideal response?
The Class Reptilia is a group of species that share a common ancestor, but does not include all of that
ancestor's descendants. It is therefore considered to be
a. monophyletic. b. polyphyletic. c. paraphyletic. d. an outgroup. e. a mosaic.
What does it mean that the genetic code is “highly conserved”?
a. it is almost universal and has not changed in millions of years b. it resists modification from environmental mutagens c. organisms can only use it a certain number of times d. all organisms and organelles - without exception - have the exact same genetic code e. the products of the genetic code - proteins - are almost the same in all organisms
Brown algae lack true roots but have similar structures called __________ that anchor them to the
substrate. a. stipes b. fronds c. holdfasts d. blades e. thalli