Which of the following is a characteristic of caecilians?
a. being almost blind
b. reproducing in water
c. having two external limbs
d. giving birth to shelled eggs
a. being almost blind
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A deletion of a particular stretch of chromosome 15 can cause either Prader-Willi syndrome or Angelman syndrome, depending on
A. the parental origin of the normal and deleted chromosome. B. whether or not the region is methylated properly. C. whether a translocation event has occurred. D. whether a nondisjunction event has occurred.
After a moss spore germinates it forms a prothallus
____________________ Indicate whether the statement is true or false.
Explain the cause of the greenhouse effect.
What will be an ideal response?
What is the probability that identical twins will share the same genotype for genes that influence human behavior?
A. 50% B. 25% C. It depends on which genes are being studied. D. 100%