Haldane pointed out that if he received a certain allele, the chance that one of his brothers would receive that allele would be 

A. 100%.
B. 50%.
C. 10%.
D. random.
E. 0%.


B. 50%.

Biology & Microbiology

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Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl- ions break away from the salt lattice and become surrounded by water molecules. Why would this cause ice to melt?

A. Hydrogen bonds are broken, and the salt ions interfere with interactions between H and O. As a result, it is more difficult for water molecules to bond and form ice. B. Hydrogen bonds are formed, and the salt ions bond with O. As a result, it is more difficulty for water molecules to bond and form ice. C. Hydrogen bonds are broken, and the salt ions bond with O and H respectively. As a result, it is more difficult for water molecules to bond and form ice.

Biology & Microbiology

Two countries, and _, account for one-third of the human population.

A. Russia; Brazil B. India; Brazil C. China; Russia D. Russia; India E. China; India

Biology & Microbiology

Flower parts are borne on the tip of a stalk referred to as the:a

calyx. b. corolla. c. filament. d. receptacle. e. stigma.

Biology & Microbiology

Which technique reduces the amount of a specific RNA or protein produced by an organism?

a. knockout b. chain termination c. knockdown d. transgenesis e. knock-in

Biology & Microbiology