From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?
A) first cell division ? synthesis of embryo's DNA begins ? acrosomal reaction ? cortical reaction
B) cortical reaction ? synthesis of embryo's DNA begins ? acrosomal reaction ? first cell division
C) cortical reaction ? acrosomal reaction ? first cell division ? synthesis of embryo's DNA begins
D) acrosomal reaction ? cortical reaction ? synthesis of embryo's DNA begins ? first cell division
D
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The ecological role of nematodes includes: a. population management of diatoms
b. being a scavenger. c. being a key to benthic communities. d. being numerous.
Queen Victoria ____
a. was a carrier of hemophilia b. had a hemophilic parent c. had hemophilia d. married a man with hemophilia e. both had a hemophilic parent and married a man with hemophilia
What is the correct name for the fluid that is collected from the body by lymphatic capillaries?
A) complement B) plasma C) interstitial fluid D) blood
What is the molecular basis of touch sensation?
A. Cell membrane distortion opens touch receptors, creating a receptor potential. B. Pressure damages the delicate strands of skin cell DNA, activating a complex signalling cascade. C. Pressure on the skin squeezes out chemical signals from epidermal glands. D. Pressure on sensory axons bursts vesicles and causes neurotransmitter release.