Birds typically have a large sternum with a bladelike vertical protrusion to which flight muscles attach called:

In addition to visual comparison, which of the following would be the best way to determine that S. niagarae and S. yellowstonensis are separate species?

a. Look for the presence of chloroplasts b. By the presence of a silica shell c. By their location in different lakes d. Compare their DNA sequences e. Carbon date them

Hemophilia is an X-linked recessive allele causing a blood disorder. What are the chances that a daughter of a normal man and a woman, who is heterozygous for the disease, will have hemophilia?

A) 0% B) 25% C) 75% D) 100%

Which feature, if changed, would NOT abolish M13's utility as a cloning vector?

A) ssDNA genome becoming a dsDNA genome B) loss of genes that make coat proteins C) replacing the segment of non-coding DNA in its genome with an indispensible gene D) switch from lysogenic to lytic lifestyle

What key words does the question contain and what do they mean?

What will be an ideal response?