Which best describes a gene?

A: different allele form of a trait

B: tightly coiled strands of DNA

C: the center of a chromosome

D: a segment of a chromosomal DNA

Differentiation switches certain genes on and off to create specialized cells. true false

Provide information regarding microbial size, shape, motility, and differentiation of the following preparations: spore stain, negative stain, simple stain, hanging drop slide, and Gram stain.

Modern research has indicated that the appendix has at least one important function: a storehouse for good bacteria aids in digestion produces insulin fights intestinal infection secretes hormones

camels have adaptations that allow them to survive in the hot desert. match the benefits to the adaptations.

The type of radiation that will penetrate farthest into a material

Organisms in which kingdom evolved first?

Will the compound O2 be joined by an ionic or covalent bond

Which description best defines blastocyst? A) a fertilized egg B) an egg released from the ovary C) a mass of specialized cells D) an embryo with a notochord

A radiographer performs an abdomen examination with a mobile digital radiography (DR) system. In order to reduce the likelihood of a repeat exposure, he decides to increase the technical factors slightly more than necessary.

Three types of bones