All seed plants share two characteristics. They have.....
D. both a and b
There are two types of _______________ phleom and __________.
A. vascular tissue / xylem
____________ is the vascular tissue through which food, which is made in the plants leaves, travels to the pant's stems and roots.
______________ is the vasvular tissue that transports water and nutrients from the soil through the roots and then throughout the plant.
A seed has three important parts--an __________, stored food, and a seed coat.
The young plant that develops from the ___________ (fertilized egg) is called the embryo.
In some plants, food is stored inside one or two seed leaves or __________.
The tough outer coating called the seed coat provides protection and keeps the food and embryo from drying out.
The seed coat DOES NOT allow a seed to remain inactive for a long time until conditions are favorable for growth.
The seed coat DOES allow a seed to remain inactive for a long time until favorable conditions for growth occur.
Seeds can be dispersed by animals in their droppings or seeds that catch in their fur, by moving________ , or by wind.
YOU fill in the blank from memory.
WATER is the correct answer.
________________ (seed sprouting) occurs when seeds absorb water from their environment. Initially, the seed uses its stored food to grow then its roots grow downward and the leaves and stem grow upward.
_________ capture the sun's energy and carry out the food-making process called ________________.
C. leaves / photosynthesis
The underside of leaves have small openings or pores called ____________ which allow carbon dioxide to enter and for oxgen and water vapor to exit.
Water, ______________, sunlight and chlorophyll are necessary for photosynthesis to take place.
C. carbon dioxide
__________ and sugar are produced as a result of the photosynthesis.
The process by which water evaporates from a plant's leaves is called ______________.
The two important functions of a plant's stem are that they contain the vessels that transport substances between the roots and the leaves and the stems ______________ for the plant.
C. provide support
Roots _____________ a plant in the ground and absorb water and nutrients form the soil.
_____________, the oldest type of seed plants, produce naked seeds (seeds without a protective covering)
Gymnosperms are classified into four groups: the __________, the gingko, the gnetophytes, and the conifers.
__________, or cone-bearing plant, are the largest group of gymnosperms on Earth.
Most gymnosperms have reproductive structures called ____________; both male cones and female cones.
Male cones produce _____________ that become the sperm cells.
Female cones contain at least one ________, the structure that contains egg cells.
_______________ is the transfer of pollen from a male reproductive structure to a female reproductive structure.
________________ occurs when pollen from a male cone falls onto a female cone and the sperm and egg join together in the ovule on the female one.
After fertilization, the ovule develops into a ___________.