In each case below, specify whether the impurity element will act as a donor or acceptor when added to the indicated semiconducting material. cd

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

When the body has a weakened immune system, the production of antibodies is increased.

Viral infections can be contracted only from direct contact with someone infected true or false