Blood returning to the mammalian heart in a pulmonary vein will drain first into the
A. vena cava.
B. left atrium.
C. right atrium.
D. left ventricle.
E. right ventricle.
B. left atrium.
Biology & Microbiology
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Chromosomal sex of a fetus with the sex chromosomes XXY is almost always ____________________
Fill in the blank(s) with correct word
Biology & Microbiology
Which organ system includes the pituitary, thyroid, and adrenal glands?
a. endocrine system b. reproductive system c. lymphatic system d. respiratory system e. skeletal system
Biology & Microbiology
This is the more technical term used by scientists to describe the carrier DNA molecule used when cloning genes.
A. plasmid B. vector C. plastic D. restriction fragment
Biology & Microbiology
For independent assortment of alleles for two different genes to occur, where must the genes be located?
What will be an ideal response?
Biology & Microbiology