This 1-inch section of the brain controls the breathing rhythm and heart rate

A) temporal lobe
B) hippocampus
C) occipital lobe
D) medulla oblongata


D

Biology & Microbiology

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Which of the following statements about DNA and RNA are true, and which are false?

a. DNA is a double-stranded molecule, and RNA is single-stranded. b. The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA. c. A hydrogen atom is present on the 3 carbon the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides. d. The DNA and RNA molecules in a cell are copied by replication before a cell divides. e. RNA is the primary long-term storage molecule for genetic information in eukaryotic cells. f. Hydrogen bonds and phosphodiester bonds maintain the structure of DNA molecules, whereas only phosphodiester bonds are important for the structure of RNA molecules.

Biology & Microbiology

To study the genome of the loblolly pine, Pinus taeda, researchers obtained DNA from ____ cells, thereby halving the

amount of DNA for initial sequencing.

a. haploid b. diploid

c. triploid d. polyploid e. hexaploid

Biology & Microbiology

The probability of rolling a die twice and getting a 2 and a 6 in no particular order is

a. 1/3 b. 1/4 c. 1/8 d. 1/18 e. 1/36

Biology & Microbiology

In the work that they do, scientists who study phylogeny are most like a ____

a. police detective b. medical doctor c. carpenter d. college professor e. real estate agent

Biology & Microbiology