Disruptions in which part of the cell cycle may lead to genetic disorders in the offspring of an organism?

A) Cytokinesis of stem cells in the skeletal system
B) Meiosis in the formation of haploid cells in a tree
C) DNA replication of X and Y chromosomes in liver cells
D) Mitosis of cells that form flower petals

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.