Which of the following taxa are extant (have at least some members that are still living; opposite of extinct)?

A. Ornithischia
B. Lepidosauria
C. Saurischia
D. theropods
E. ichythosaurs


B. Lepidosauria

Biology & Microbiology

You might also like to view...

Some clones of the original immune cells are __________ cells, long-lived B and T cells reserved for

future encounters with the antigen. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

In a highly basic solution, pH = 13, the dominant form of glycine is:

A) NH2—CH2—COOH. B) NH2—CH2—COO?. C) NH2—CH3+—COO?. D) NH3+—CH2—COOH. E) NH3+—CH2—COO?.

Biology & Microbiology

The molecule that traps the sun's energy is 

A. ATP. B. glyceraldehyde-3-phosphate. C. chloroplast. D. chlorophyll.

Biology & Microbiology

________ would help prevent the creation of leachate.

A- adding hazardous chemical to solid waste prior to landfilling B- Adding O2 to solid waste prior to landfilling C- Capping the landfill when it is filled to capacity D- Adding H2O to solid waste prior to landfilling E- Using a single-liner system rather than a double-liner system

Biology & Microbiology