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

Biology & Microbiology

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Explain the cause of the greenhouse effect.

What will be an ideal response?

Biology & Microbiology

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%

Biology & Microbiology

After a moss spore germinates it forms a prothallus

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

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.

Biology & Microbiology