Name the layer from which fingernails and toenails are derived
A.
Hypodermis
B.
Epidermis
C.
Dermis
B
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This portion of a DNA segment does not code for a protein
a) RNA b) introns c) exons d) polyribosome e) ribosome
One primary spermatocyte containing ____ chromosomes yields ____ spermatozoa containing ____ chromosomes, whereas one primary oocyte containing ____ chromosomes yields ____ ova (ovum) containing ____ chromosomes
a. 46, 2, 23, 46, 2, 23 b. 46, 4, 23, 46, 1, 23 c. 46, 4, 23, 46, 4, 23 d. 23, 1, 23, 23, 1, 23 e. none of these answers.
This is defined as a group of cells with similar structure and function
a. Tissue b. Organ c. Molecules d. Compounds e. Organism
The figure is a process figure of the chemical synapse. What does "D" represent?
A. Voltage-gated Ca2+ channel B. Synaptic vesicle C. Presynaptic terminal D. Synaptic cleft E. Postsynaptic membrane