Chapter 2.2 From Pollen To Seed Flashcards
_________is the uniting of a sperm cell from a pollen grain with an egg cell into the ovary ; this leads to the formation of a seed
FERTILIZATION
The transfer of pollen from the anther to the stigma is called _______
POLLINATION
Insects like bees,moths, and ants along with bats and some birds are called ________ because they also aid in pollination.
POLLINATORS
______is the sweet liquid usually stored in the base of the blossom.
NECTAR
A _________begins growing from the pollen’s location on the stigma, traveling through the style and into the ovary.
POLLEN TUBE
The _______(male reproductive cell) of the pollen grain divides to form two ______
SPERM CELL(S)
The sperm cells move through the pollen tube, and one of them unites with the _____ (female reproduction cell) in the ovule, causing fertilization
EGG CELL
The fertilized egg ( the egg cell and sperm cell combined ), called the ____ , is the beginning of a new plant.
EMBRYO
Stored food is called an ____
ENDOSPERM
A _____surrounds the embryo and endosperm and protects the seed until it can grow.
SEED COAT
The tiny shoot that will become the stem and leaves is called a _____
PLUMULE
The small root that will develop into the root system is called a _____
RADICLE
Structures designed for food absorption and storage are called ____
COTYLEDONS
The early growth of a seed is _______
GERMINATION
Plants whose seeds only have one cotyledon are called _______
MONOCOTS
Plants whose seeds have two cotyledons are called ______
DICOTS
Spreading is called ______
DISPERSAL
__________ occurs when the ripened fruit bursts open and scatters the seeds some distance from the plant.
MECHANICAL DISPERSAL
When birds and many other animals feed on fleshy fruits the seeds pass through the digestive system unharmed or are dropped by the animal before eating it is called _______
AGENT DISPERSAL
