What is the key concept addressed by the question?

What will be an ideal response?


The question is about different forms of selection.

Biology & Microbiology

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Primordial germ cells can be found in the ________ of the developing female embryo

A) yolk sac B) allantois C) placenta D) chorion

Biology & Microbiology

If one compares the base sequences of related genes from different species, one is likely to find that corresponding ________ are usually conserved, but the sequences of ________ are much less well conserved

A) exons; introns B) introns; exons C) introns; proteins D) chaperons; exons E) introns; chaperons

Biology & Microbiology

An embryo sporophyte surrounded by nutritive tissue and then a tough, protective outer coat makes up

a(n) ____ that shelters the embryo from drought, cold, and other adverse conditions.

a. pollen grain b. spore c. ovule d. seed e. strobilus

Biology & Microbiology

Invisible living creatures were thought to exist and cause disease long before they were ever observed.

Answer the following statement true (T) or false (F)

Biology & Microbiology