Species are identified based on a unique combination of physical or molecular characteristics under the

A. phylogenetic species concept.
B. biological species concept.
C. evolutionary species concept.
D. ecological species concept.
E. general lineage concept.


A. phylogenetic species concept.

Biology & Microbiology

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If an organism has the same life strategy as a maple tree, the synaptonemal complex will be observed ____

a. only in alternating generations b. in each generation c. only in a unicellular haploid phase d. only in a multicellular haploid phase e. only in gametophytes

Biology & Microbiology

Why is the movement of blood in veins sometimes described as "milking a vein"?

What will be an ideal response?

Biology & Microbiology

Prokaryotes have a(n) nucleus that contains DNA

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

Bacteria in the ?-proteobacterial clade ________ are the most abundant organisms on Earth and demonstrate unique adaptations to life in the oligotrophic open ocean.

What will be an ideal response?

Biology & Microbiology