Which of the following statements about asteroids is true?
A. Asteroids are all very large and are mostly made up of stone, iron and nickel.
B. Asteroids vary greatly in size and are mostly made up of frozen water and gas.
C. Asteroids vary greatly in size and are mostly made up of stone, iron and nickel.
D. Asteroids are all very large and are mostly made up of frozen water and gas.

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Each hereditary trait corresponds to

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation