The original pedigrees, used in France in the fifteenth century, resembled

A) a bird's foot.
B) a cactus plant.
C) a snake eating a frog.
D) an insect's antennae.


A) a bird's foot.

Biology & Microbiology

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Which factor serves as the primary basis for categorizing a biome?

a. Dominant plant types b. Annual precipitation c. Number of endemic species d. Type of food web

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All connective tissues share which of the following structural features?I Contain cellsII Contain a matrix filled with extracellular materialIII Contain sarcomere units

A. II only B. I and III C. I and II D. I, II, and II E. II and III

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How could an embryonic stem cell be used to repair a severed spine?

A. Embryonic stem cells secrete proteins that repair all other cell types, including nerve cells. B. Embryonic stem cells are primarily involved with neural growth and development. C. Embryonic stem cells can grow into any other cell type, including a nerve cell. D. Embryonic stem cells can cause any other cell type to multiply.

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The euphotic zone is confined to the:

What will be an ideal response?

Biology & Microbiology