Plants in the desert a. effectively conserve and retain water b. have high levels of transpiration c. release 50-80% of water back into the ecosystem d. make their own precipitation

Describe five factors that influence the value of fuel

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

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.