What structure will help prevent the backflow of blood within the veins?
a. Valves
b. Skeletal muscle
c. Endothelium
d. Smooth muscle
e. Basement membrane
a
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What kind of climate is most often associated with epiphytic plants?
A) warm B) humid C) sunny D) freezing
Spinal reflexes do not involve
a. afferent nerves. b. efferent nerves. c. interneurons. d. the spinal cord. e. the brain.
In the garden peas example above, a tall plant with white flowers crossed with a dwarf plant with
purple flowers produces 1/4 tall purple flowers, 1/4 tall white flowers, 1/4 dwarf purple flowers, and 1/4 dwarf white flowers. What is the genotype of the parents? What will be an ideal response?
Fibrous structural proteins of the extracellular matrix are embedded in gels formed from polysaccharides called
a. elastin. b. fibronectin. c. glycosaminoglycans (GAGs). d. laminin.