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Review Module 15

Module 15 Review Exploring Creation with Biology

Name the four processes for which plants require water. Which can be neglected for a short amount of time? Photosynthesis Turgor Pressure Hydrolysis Transport -- Turgor Pressure
The flowers of a plant open each morning and close each night. What type of movement is this? Nastic movement
You place a plant so that one side is in the shade and the other is in sunlight. The plant grows so that all of its leaves point towards the sunlight. What type of movement is this? Phototropism
Describe the cohesion-tension theory of water transport in plants. Water molecules like to stay together, so when a water molecule evaporates from a stomata, it pulls the molecules below it up, causing a chain reaction with all of the molecules below and eventually causing water and nutrients to move up from the roots.
Do xylem cells need to be alive in order to function? The xylem cells do not have to play an active part in transporting water and dissolved nutrients in the plant because of the cohesion-tension theory of transport.
Do phloem cells need to be alive in order to function? Phloem cells take an active part and expend energy in the translocation of organic molecules in a plant, so they must be alive.
What substances do xylem contain? Water and dissolved minerals
What substances do phloem contain? Sugar and organic substances
Do insectivorous plants really eat insects? Why? No. They decompose the insects and use their raw materials for biosynthesis. They still produce food through photosynthesis.
Genetically, what is the difference between vegetative reproduction and sexual reproduction in plants? In vegetative reproduction the genetic code of the offspring is identical to the parent; in sexual reproduction the offspring are similar to, but not identical to, the parents.
A gardener says his crabapple tree is now producing normal-sized apples. What must have happened? A limb or limbs from a tree that produces normal-sized fruit must have been grafted onto the crabapple tree.
What is the male reproductive organ of a flower? Stamen
What is the female reproductive organ of a flower? Carpel (pistil)
Why are the pollen grains and embryo sacs of flowers sometimes considered the gametophyte generation in an alternation of generations life cycle? Both structures are multicellular and they both reproduce using gametes, which is the basic definition of the gametophyte generation in alternations of generation life cycles.
What types of cells are found in a pollen grain? Sperm cell and tube nucleus
Typically, how many cells are in an embryo sac? How many get fertilized? Seven. Two. (The megaspore undergoes mitosis three times to make eight nuclei, it then segments into six small cells and one large cell that has two nuclei. One of the fertilized cells becomes the zygote and the other becomes the endosperm.)
Identify the flower structures. Study pictures.
What is the difference between pollination and fertilization? Pollination is the transfer of pollen from the anther to the stigma, while fertilization is when the sperms fuse the the egg and the large central nucleus in the embryo sac.
How many sperm cells are used in plant fertilization? Two
Where does the endosperm come from and what is its purpose? Endosperm comes from the fertilization of the large, two-nucleus cell that is at the center of the embryo sac. It provides nutrition for the developing embryo.
How do the cotyledon or cotyledons provide food for the plant before and after germination? They absorb the endosperm or aid in the transfer of nutrients from the endosperm to the embryo before germination. After germination, they often perform the first photosynthesis in the plant.
Name the three basic parts of the plant embryo and what each gives rise to in germination. Radicle becomes the root; Hypocotyl becomes the stem; Epicotyl becomes the first true leaves
What is the purpose of a fruit? Allows for the dispersal of seeds to places away from the plant.
Name three ways pollen is transferred from the stamens of one flower to the carpel of another. Wind Bees Beetles Birds Moths Butterflies
Why are cotyledons sometimes called "seed leaves?" They form leaf-like structures if they end up rising above ground with the seedling and often carry out photosynthesis for a while.
Created by: michelemegna
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