Another name for a chromosome is a _______, since it contains genes that are often inherited together
A. linkage group
B. crossing over group
C. genetic recombinant
D. bivalent
A
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When you are upright, what is the primary mechanism that propels blood in your feet back to your inferior vena cava?
A. recoil of elastic fibers in the walls of the leg veins B. contraction of the left ventricle of the heart C. contraction of smooth muscle in the walls of the leg veins D. contraction of skeletal muscles in your legs E. the valves in the leg veins alternating between open and closed
What is the immune function of the placenta in human and marsupial embryo development?
What will be an ideal response?
Stem cells can be found in ____
a. nerve tissue b. all adult tissue c. muscle d. epidermis e. umbilical cord blood
Why are membrane-bounded organelles able to facilitate faster chemical reactions?
a. Membranes are permeable to all solutes and their enzymes. b. Enzymes are organized close together on the membrane surface. c. Membranes lower the activation energy of biochemical reactions. d. Membrane-bounded organelles act as catalysts for biochemical reactions. e. Enzymes are more readily available within membrane-bounded organelles