17 terms

Life Science Vocab - Chapter 10

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cellular respiration
a series of chemical reactions that convert the energy in food molecules into a usable form of energy called ATP
photosynthesis
a series of chemical reactions that covert light energy, water, and carbon dioxide into the food-energy molecule glucose and give off oxygen
photoperiodism
a plant's response to the number of hours of darkness in its environment
plant hormone
a substance that acts as a chemical messenger within plants
stimulus
a change in an organism's environment that causes a repsonse
tropism
a response that results in plant growth toward or away from a stimulus
alternation of generations
when the life cycle of an organism alternates between diploid and haploid generations
embryo
an immature diploid plant that develops from the zygote
fruit
the ovary, and sometimes other flower parts, that contains one or more seeds
ovary
a structure at the base of the style that contains one or more ovules
ovule
the female reproductive structure of a seed plant where the haploid egg develops
pistil
the female reproductive organ of a flower
pollen
forms from tissue in a male reproductive structure of a seed plant
pollination
occurs when pollen grains land on a female reproductive structure of a plant that is the same species as the pollen grains
seed
an embryo, its food supply, and a protective covering
spore
a daughter cell produced from a haploid structure
stamen
the male reproductive organ of a flower