In addition to seeds, which of the following characteristics are unique to the seed-producing plants?

A) sporopollenin

B) lignin present in cell walls

C) pollen

D) use of air currents as a dispersal agent

E) megaphylls

If a star is considered medium-sized what is it?

What is the process respWhat is the process responsible for gamete formation? onsible for gamete formation?

What structure allows gases to enter a leaf

Glass plate which the specimen is placed on

Chemicals produced by bacteria that limit the growth of other bacteria are called:

Would a person be squashed by extreme gravity, float with ease, freeze, burn up, or something else

According to "Life Without Gravity," why can astronauts' muscles become weak? A. Without gravity, the blood is rerouted from the legs to the head. B. Without gravity, the body "grows" by as much as several inches. C.

What type of igneous rock has two distinct grain sizes indicating two stages of cooling

A certain type of diploid organism has 38 chromosomes. how many chromosomes would a gamete of this organism have?

Griffith, in his 1928 experiments, demonstrated that bacterial strains could be genetically transformed. The evidence that DNA was the "transforming principle" responsible for this phenomenon came later.