Which best describes a pilus ?
a. a tube that extends from a bacterium
b. a piece of dna transferred by a virus
c. a virus that causes a common cold
d. a protective shell around a bacterium

What do animals wth echolocation have in common other than echolocation

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f