A clade includes which of the following?
A. an ancestor and all its descendant species, and taxa with shared derived characters
B. an ingroup only
C. an outgroup and an ingroup
D. a common ancestor and all its descendant species
E. one taxon with shared derived characters
Answer: D. a common ancestor and all its descendant species
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An invasive species:
A. is any non-native species that has been introduced to an ecosystem. B. is always the competitively dominant species in an ecosystem. C. is any species that has been genetically modified by man. D. is any species that causes disease and death in host organisms. E. is any species that has a negative impact on community diversity.
The transfer of energy from a photoexcited electron to another electron of an adjacent pigment molecule is known as
A) photoexcitation. B) quantum leap. C) photophosphorylation. D) resonance energy transfer. E) photorespiration.
Which tissue has contractile cells that are joined by intercalated disks, allowing it to contract as a unit?
a. smooth muscle b. cartilage c. skeletal muscle d. cardiac muscle e. adipose tissue
Genetic distance refers to the proportion of dissimilar nucleotides between two homologous sequences
Indicate whether the statement is true or false