The most ancient type of organisms on Earth originated:

A. 4,004 years ago
B. 7,200 years ago
C. 2 million years ago
D. 3.5 billion years ago
E. 13 billion years ago


D. 3.5 billion years ago

Biology & Microbiology

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Convergent evolution results in the development of:

A. analogies. B. homologies. C. similes. D. homilies.

Biology & Microbiology

Almost all of the antibodies found in a newborn are

A. the result of infection. B. self-made. C. IgM. D. the result of passive immunity.

Biology & Microbiology

During which mitotic phases are duplicated chromosomes present?

(a) all but telophase (b) prophase and anaphase (c) all but anaphase and telophase (d) only during metaphase at the metaphase plate (e) both b and b are correct

Biology & Microbiology

Patients who have type 2 diabetes no longer respond normally to insulin. Which statement best explains this symptom?

A. The signal transduction pathways in the cells no longer exist. B. The nucleus of their cells are altered so that insulin can not bind. C. Type 2 diabetics do not produce insulin. D. The insulin receptors on their cells have mutated. E. Their cells express less insulin receptor.

Biology & Microbiology