Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. Which of the following best describes the type of transport across the cell membrane?

A. active transport
B. passive transport
C. facilitated diffusion
D. co-transport


A. active transport

Biology & Microbiology

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The long snout of the giant anteater, Myrmecophaga tridactyla, of South America, and the echidna, Tachyglossus aculeatus, of Australia, are animals of different evolutionary lineages that are both adapted to eating ants. This is an example of

A. selective breeding. B. anatomical homology. C. analogous traits. D. artificial selection. E. Both analogous traits and artificial selection are correct.

Biology & Microbiology

Monkeys in Africa and Asia most recently evolved from ____

a. a different common ancestor than monkeys in South America b. a shared common ancestor with monkeys in South America c. multiple common ancestors d. different common ancestors than one another e. a common ancestor on a neighboring island

Biology & Microbiology

If you wanted to design a drug to stop the sense of smell, what kind of receptor would you target?

A. photoreceptor B. chemoreceptor C. proprioceptor D. electroreceptor E. thermoreceptor

Biology & Microbiology

How many nucleotide bases are found in the code for each amino acid?

a. 2 b. 3 c. 4 d. Varies with the particular amino acid

Biology & Microbiology