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biology 2

QuestionAnswer
Name the 3 main types of plant cells. Paraenchyma cells, Collenchyma cells, Sclerenchyma cells.
Parenchyma cell functions and an example of where these cells are found. Functions- storage,photosyenthesis,gas exchange,tissue repair and replacement. Can be found in potatoes.
Collenchyma cell functions and an example of where these cells are found. Functions: support the surrounding tissue, provides flexibility for the plant, tissue repair and replacement. Can be found in celery.
Schlerenchyma cell functions and an example of where these cells are found. Functions: support transport of materials. Can be found in pears
Name the 4 main types of plant tissues. Meristematic Tissues, Apical Meristems, Intercalary Meristems, and Lateral Meristems.
Describe meristemic tissues. regions of rapidly dividing cells.
Describe dermal tissues. the layer of cells that makes up the outer covering on a plant is the epidermis.
Describe vascular tissues Xylem-Transports water away from the roots, and coposes of specialized cells called vessel elements and tracheids. Phloem-transports dissolved sugars and other organic compounds throughout the plant, sieve-tube member and companion cells.
Describe ground tissues. Consists of parenchyma, collenchyma,and sclerenchyma cells. Functions include photosynthesis, storage, and support. Most common type of tissue found in plants.
Describe root functions. Roots anchor the plant.
List the layers of the root from the outside inward. Encircling each cell of the endodermis is a waterproof strip called a Casparian strip. The layer of cells directly next to the endodermis toward the center of the root is called the pericycle. Beyond the pericycle you would find the vascular tissue.
Describe the functions of stems. The main function of a plant's system is support of a plant's leaves and reproductive structures.
Explain herbaceous and woody stems. Herbaceous- soft flexible green stems. Woody- have tough cork like tissues.
Describe the functions of leaves. Main function of a leaf is photosynthesis.
Name the 4 plant hormones. Auxin, Gibberellins, Ethylene, Cytokinins.
Describe auxins and how they affect a plant. Stimulates the lengthening of cells. Affects the rate of growth in roots, stems and leaves. Two effects are: causes fruits to drop from plants when they are rip, and it causes apical dominance which makes the plant grow mostly upward.
Describe gibberellins and how they affect a plant. Causes cell elongation, stimulates cell division, and affects seed growth. Applying gibberellins to a plant can cause an increase in height.
Describe ethylene and how they affect a plant. Affects the ripening of fruits. Fruits are softer and sweeter than unripe fruits. The only known gaseous hormone. Found in plant tissues such as ripening fruits, dying leaves, and flowers.
Describe cytokinins and how they affect a plant. Promote cell division by stimulating the production of the proteins needed for mitosis and cytokineses. Producedin rapidly dividing cells when used in combination with auxins it causes rapid growth of the plant.
Describe a nastic response and give 2 examples. A response of a plant that causes movement independent of the directions of stimulus, it is reversible, and can be repeated. Ex: sunflowers following the sun during the day. closing of venus flytrap's leaves.
Describe tropic response. A tropism is a plant's growth response to an external stimulus.
Name and describe three tropisms. Phototropism- plants reacts to light, is caused by an unequal amount of auxin. Gravitropism- it is a response to gravity. Thigmotropism- it is a response to a mechanical stimuli.
Created by: joelsawyer
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