Chapter 15

series of chemical reactions that convert the energy in food molecules into ATP

• photosynthesis

• stimulus

• cellular respiration

• photoperiodism

series of chemical reactions that convert light energy, water, and carbon dioxide into glucose and give off oxygen

• tropism

• photosynthesis

• cellular respiration

• plant hormone

usable power

• energy

• tropism

• stimulus

• photosynthesis

plant’s response to the number of hours of darkness in its environment

• photosynthesis

• plant hormone

• cellular respiration

• photoperiodism

any change in the environment that causes organisms to respond

• tropism

• stimulus

• energy

• hormone

occurs when the life cycle of an organism alternates between diploid and haploid stages

• pollen grain

• alternation of generations

• stamen

• generation

immature diploid plant that develops from the zygote

• ovule

• pistil

• embryo

• spore

haploid and diploid stages in the life cycle of a plant

• mitosis

• generation

• ovary

• pollen grain

structure that forms from tissue in the male reproductive structure of a seed plant and produces sperm cells

• pollination

• mitosis

• pollen grain

• embryo

process that occurs when pollen grains land on a female reproductive structure of a plant that is the same species as the plant that produced the pollen grains

• pollen grain

• mitosis

• pollination