Keystone Species

question 63

Multiple Choice

Keystone species

• A) have the most biomass in a community.
• B) are usually top predators.
• C) can affect community structure regardless of population size.
• D) are invasive predator species that eat native herbivores.

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Definitions:

Nuclear DNA

The DNA contained within the nucleus of a cell, encoding for the majority of the organism's genetic information.

Cell Nucleus

A membrane-bound organelle found in eukaryotic cells that contains most of the cell's genetic material, organized as multiple long linear DNA molecules.

Mitochondrial DNA

The small circular DNA found in mitochondria, which are the energy-producing organelles within cells, passed down maternally.

Base Pairs

Pairs of nitrogenous bases that connect the complementary strands of DNA or RNA, consisting of adenine with thymine (or uracil in RNA) and cytosine with guanine.