Researchers noted that only a few aphids changed color to green from their original red. This is an unusual observation among any animals. What research question came out of the observations?
A. Is the color shift of certain aphids due to genetics within a select species?
B. Is the color shift of certain aphids due to changes in weather conditions?
C. Is the color shift of certain aphids due to genetics or some other factor?
D. Do other aphids change colors as they age?
E. Will green aphids change their color to red, or remain green as they age?
C. Is the color shift of certain aphids due to genetics or some other factor?
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Which of the following cell types retains the ability to undergo cell division?
A) a sclereid B) a parenchyma cell near the root tip C) a functional sieve tube element D) a tracheid E) a stem fiber
It is well established that developmental biology has impacts on public health. For instance, thalidomide, an anticonvulsive and antihistimine medication, was prescribed to reduce nausea or morning sickness in pregnant women. It was subsequently shown to cause severely deformed limbs (hands and feet, but reduced arms and legs) in children whose mothers took the medication. What might thalidomide
do during development? A. Cause a defect in the fertilization of an egg. B. Severely alter blastulation in the embryo. C. Impair morphogenic fields within the embryo. D. Impair neural tube formation. E. Block cell division during blastulation.
Which cells release antibodies into the plasma?
a. T helper cells b. plasma cells
c. cytotoxic T cells d. B cells e. antigen presenting cells
Which anorexia nervosa symptom in physical in nature?
A. Dry, yellow skin B. Perfectionism C. Frequent weighing D. Preoccupation with food