Biology 1B - Lesson Two
A food-rich tissue that nourishes the seedling as it grows is called the _____.
Endosperm
Seed _____ is the early growth stage of the plant embryo.
Germination
In _____, stems are used as scions.
Grafting
Hormone
Substance produced in one part of an organism that affects another part of the organism.
Lateral Bud
A meristematic area on the side of a stem that gives rise to side branches.
In angiosperms, pollen grains are produced within the _____.
Anther
When buds are used as scions, the process is called _____.
Budding
Herbicide
Compound that is toxic to plants.
During _____, plant embyros are alive but not growing.
Dormancy
In _____, plant growth and activity decreases or stops.
Dormancy
The process of _____ in angiosperms produces a diploid zygote and a triploid endosperm.
Double Fertilization
The female gametophyte of the flowering plant consisting of eight nuclei and the surrounding membrane is called the _____.
Embryo Sac
Short-Day Plants
Flower when days are short.
Apical Dominance
Inhibition of a lateral bud growth near stem tips.
Brightly colored _____ attract pollinators to flowers.
Petals
Gibberellins
Plant hormones that increase the overall size of plants.
Auxins
Plant hormones that stimulate cell elongation.
Phytochrome
Plant pigment that responds to periods of light and darkness.
Epiphytes
Plants that are not rooted in soil and grow directly on other plants.
In gymnosperms, pollen grains form in _____.
Pollen Cones
When a pollen grain lands on a stigma, it begins to grow a (an) _____.
Pollen Tube
Phototropism
Response of a plant to light.
Photoperiodism
Response of a plant to periods of light and darkness.
Gravitropism
Response of a plant to the force of gravity.
Thigmotropism
Response of a plant to touch.
The female gametophyte is produced by _____ in gymnosperms.
Seed Cones
The sticky portion of the carpel where pollen grains often land is called the _____.
Stigma
Strawberry plants send out long trailing stems called _____ that produce roots when they touch the ground.
Stolons
Tropisms
The responses of plants to external stimuli.
When flowering plants reproduce asexually it is called _____.
Vegetative Reproduction
