The structure indicated by the letter "B" above
represents
a. actin.
b. myofibril.
c. myosin.
d. sarcoplasmic reticulum.
e. muscle fiber
D
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The apparent lack of intermediate forms in the fossil record can be explained by the ____ hypothesis
a. disruptive selection b. fossil decay c. punctuated equilibrium d. genetic drift e. allopatric speciation
You are a genetic counselor, and a couple comes to you with concerns that if they have a child
together it could have hemophilia. The woman has an X-linked recessive form of hemophilia, but the man does not. Which of the following would be a correct thing to tell them?
a. Any child that they produce will have a 50% chance of having hemophilia. b. All of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of having hemophilia. c. None of their offspring should have hemophilia, but all of their female offspring will be carriers for hemophilia. d. Each of their male offspring will have a 50% chance of having hemophilia, and while their female offspring should not have hemophilia they will each have a 50% chance of being carriers. e. All of their male offspring will have hemophilia, and while their female offspring should not have hemophilia, they will all be carriers.
Explain what occurs when a plant exhibits heliotropism. What will be an ideal response?
DNA profiling (also known as DNA "fingerprinting") involves the analysis of
What will be an ideal response?