How does the circulatory system of an annelid differ from the circulatory system of a gastropod?
What will be an ideal response?
Annelids have a closed circulatory system, whereas gastropods have an open circulatory system.
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What is needed to estimate species relatedness with a molecular clock?
A. DNA accumulates mutations at a regular rate B. known mutation rate for a gene C. the number of differences in DNA sequences for a gene in two species D. the same gene identified in two species E. All answers are correct.
The sequence in the accompanying figure illustrates:a
classical conditioning. b. habituation. c. imprinting. d. insight. e. operant conditioning.
Evolution can be defined as change in ________ in a population
Fill in the blank(s) with correct word
Which statement is not true about eukaryotic ribosomes?
A) Ribosomes found in mitochondria are 70S rather than the 80S type found in the cytoplasm. B) Both bound and free ribosomes consist of a 40S and a 60S subunit. C) Bound ribosomes produce proteins that are destined for secretion from the cell. D) Bound ribosomes are attached to the endoplasmic reticulum (ER). E) Bound ribosomes are always bound while free ribosomes are always free.