Which represents the correct order of evolution of chordate features?

Select one:
a. amnion ? limbs ? lungs ? jaws ? vertebrae
b. limbs ? lungs ? jaws ? vertebrae ? amnion
c. lungs ? jaws ? vertebrae ? amnion ? limbs
d. vertebrae ? jaws ? lungs ? limbs ? amnion
e. vertebrae ? amnion ? limbs ? lungs ? jaws


d. vertebrae ? jaws ? lungs ? limbs ? amnion

Biology & Microbiology

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The use of SNPs for analyzing genomes is based on ____

a. the nucleotide base pairing in the SNPs b. the types of nucleotides in the SNPs c. differences in SNPs among individuals d. the ratio of purines to pyrimidines in SNPs e. bonding patterns between nucleotides in the SNPs

Biology & Microbiology

Nephridia are

a. circulatory organs. b. respiratory organs. c. excretory organs. d. endocrine organs. e. part of the nervous system.

Biology & Microbiology

The function of adenylyl cyclase is to:

A. cleave PIP2 into DAG and IP3. B. stimulate the release of calcium from the endoplasmic reticulum. C. catalyze the conversion of ATP to cAMP. D. directly activate protein kinase A (PKA).

Biology & Microbiology

Ocean currents ____ in the Northern Hemisphere and ____ in the Southern Hemisphere.

A. circulate counterclockwise; circulate clockwise B. move west to east; move east to west C. move east to west; move west to east D. circulate clockwise; circulate counterclockwise E. undulate along a line northeast and southwest; undulate along a line southeast to northwest

Biology & Microbiology