Which prokaryotic organism shows up as old as the oldest fossils

A. Archaea

B. Echinoderms

C. Algae

D. Cyanobacteria

What characteristic is shared by both inceptisols and entisols, the soils of flood plains? a. They both have well-developed soil horizons and profiles. b. Both are young and only beginning to develop horizons and a soil profile. c.

Select all that apply Which of these are accessory organs of the skin? Select all that apply. nails hair follicles glands subcutaneous layer

The electrons between atoms in metallic bonds A. allow for bonding metals to be reactive. B. allow for bonding metals to be stable. C. are stationary and provide durability to the metal. D. are attracted to the neutrons of the metal.

In which of the following ways are DNA and mRNA similar? A) They are both always kept in the nucleus to keep them safe from damage. B) They are both double stranded and must be unzipped during replication and transcription.

Class Mammalia is divided into two subgroups: marsupials and placental mammals. a. True b. False

What happens to Earth when it is farthest from the sun? It moves fastest. It stops rotating. It moves slowest. It stops revolving.

What are two different habitats in a prairie ecosystem and name one organism found in each habitat.

Which level on the energy pyramid has the third most energy? A. primary producers B. primary consumers C. secondary consumers D. tertiary consumers

How do pH affect the stability of double-stranded nucleic acid?

What is the first step in the scientific process