A student is comparing the different macromolecule types for a biology class. The student described the structure of the molecules but then must complete the table for the functions of these molecules. Which description accurately compares the functions of carbohydrates and proteins and can be used to complete the table? A) Carbohydrates and proteins can both be used for energy by the cell.
B) Carbohydrates and proteins can both be used as enzymes by the cell.
C) Carbohydrates and proteins can both be used for signaling by the cell.
D) Carbohydrates and proteins share no common functions since their structures are different.

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days, followed by 7 days when no hormones are ingested. which of the following statements most accurately describes the effects of birth-control pills? -birth-control pills maintain constant levels of estrogens and/or progesterone so there is no surge in lh and ovulation does not occur.-birth-control pills inhibit the development of the uterine lining so implantation of a fertilized oocyte cannot occur.-birth-control pills maintain constant levels of estrogens and/or progesterones and mask the release of the oocyte from the follicle.-the 7 days with no hormones does not allow a thick enough uterine lining to form so a fertilized oocyte cannot implant.

What is the definition of genes? a. small rna chains that transfer a specific amino acid to a growing polypeptide chain at the ribosomal site of protein synthesis during translation b. sections of dna a cell copies as rna strands to make specific proteins during transcription and translation c. molecules of rna encoding a chemical blueprint for a protein product