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

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

Genetic distance refers to the proportion of dissimilar nucleotides between two homologous sequences

Indicate whether the statement is true or false

Biology & Microbiology