Why does a flower wilt after it has been pollinated?
It wilts because it is not longer needed for the process of reproduction
What is the function of the guard cells?
To regulate the size of stomata
Which structure in the root increases the surface area for water absorption?
Which part of the flower is responsible for protecting the developing bud?
What structure allows angiosperms to reproduce on dry land?
Pollen grains do not require water for reproduction
When does pollination occur?
It occurs when the pollen grain lands on the stigma
What are the four parts of the pistil?
Stigma, Style, Ovary, Ovules
What are the four classes of gymnosperms?
Cycads, Ginkgoes, Gnetophytes, Conifers
What two parts make up the stamen?
Name all the parts of a flower.
petals, sepals, pistil, stamen
What is meant by a positive tropism?
It is the response by the plant toward the stimuli
What is the function of the spongy layer?
Its function is to store excess gases. Secondary site of photosynthesis.
What is the function of the cortex?
Store excess food and water
What is auxin?
It is a plant hormone that stimulates growth of new cells in the tips of the roots and stem
What is the function of the upper and lower epidermis?
The upper and lower epidermis protect the internal structures of the leaf
Which structure in the flower develops into the seeds?
What is the function of the phloem?
To carry food down the plat from the leaves
What is the function of the xylem?
To carry water and minerals up the plant from the roots
What is the name of the female part of the flower?
What is the function of the root hairs?
To increase the surface area of the root so it can absorb more water
What are the two types of cones found in gymnosperms?
male and female
Which type of vascular tissue makes up the bark?