Which of the following is most closely associated with cilia?
a. actin and myosin
b. intermediate filaments
c. dynein and microtubules
d. microfilaments and actin
e. myosin motor molecules and microfilaments
C
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Which are characteristic of type A blood?
a: Has anti-A antibodies b: Has anti-B antibodies c: Has surface antigen A on its erythrocytes d: Has surface antigen B on its erythrocytes e: Has neither surface antigen A nor B on its erythrocytes f: Will agglutinate with blood type B A. b, c, d, f B. a, c, d, f C. a, d, f D. b, c, f E. a, c, f
The trophoblast is mostly responsible for forming the ________
A) placental tissue B) allantois C) lining of the endometrium D) archenteron
________ is a mechanism in the body that continually senses the internal and external environment and makes adjustments to maintain homeostasis.
A. Homeostasis B. A negative feedback loop C. A positive feedback loop D. Metabolism
What is the spheroidal stage of early prenatal development with about 16 to 64 cells called?
A. Blastomere B. Morula C. Embryo D. Zygote E. Blastocyst