Which is representative of late prophase?
A)Chromosomes begin to condense as bar-like shapes.
B)Centrosomes begin to separate.
C)Attachment of chromatid pairs to spindle microtubules.
D)Disappearance of nuclear envelope and migration of nucleoli to poles of cell.
C)Attachment of chromatid pairs to spindle microtubules.
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Semen contains all of the following components EXCEPT:
a. Sperm b. Epididymal fluid c. Prostatic fluid d. Bulbourethral fluid e. Seminal fluid
Mary got the chicken pox from her little brother when she was 6. She will most likely not contract this disease again. What type of immunity is described in this scenario?
A. Artificial active immunity B. Artificial passive immunity C. Natural passive immunity D. Natural active immunity
Hemoglobin
a. plays a critical role in determining the total amount of O2 that is exchanged in the lungs because it removes O2 and keeps the low so that net diffusion continues b. combines only with O2 c. is found in erythrocytes d. does both a and c e. does none of the above
Which cells resemble basophils and are found in connective tissue, close to small blood vessels?
A. Dendritic cells B. Mast cells C. NK cells D. Alveolar macrophages E. Cytokines