Food for Thought
The conversion of nitrogen from N2 to NH3 is known as?
Nitrogen Fixation
This word describes a relationship in which one organism benefits and the other neither benefits nor is harmed
Comensalistic
The angiosperm life cycle is characterized by "three F's" known as?
Flowers, (double) Fertilization, and Fruits
The mature, ripened ovary of a flowering plant, which develops after pollination and contains the seeds is known as?
Fruit
This "stress" hormone slows the growth of plants, promoting stomatal closure during drought, seed dormancy, and leaf senescence.
Abscisic Acid (ABA)
This provincial plant is an example of a carnivorous plant that captures and digests insects and other small mammals
Pitcher Plant (Sarracenia purpurea)
These nonpathogenic bacteria live between the cells of host plant tissues
Endophytes
Flowers consist of four floral organs. Which two are directly involved in reproduction?
Stamens and Carpels
This category describes flowers that lack either stamens or carpels
Imperfect Flowers
Some hypothesize that flowering may also be affected by a chemical "flowering signal molecule" called?
Florigen
This Law states that a plant's growth is limited by the resource that is in the shortest supply
Liebig's Law of the Minimum
These plants have an unusual adaptation which all them to grow on another plant and obtain water and minerals from rain (typically through the leaves)
Epiphytes
In angiosperms, 4 eggs are produced from each megasporangium. How many survive?
What type of pollinator(s) would you expect to visit a flower that opens at night?
Bats and Moths
Thigmomorphogenesis refers to changes in the form of a plant that result from?
Mechanical disturbance
Micronutrients function as cofactors. What are cofactors?
Nonprotein helpers in enzymatic reactions
In this form of mychorrizae, fungal hyphae extend into the root of a plant, penetrating the cell wall to form arbuscules
Endomycorrhizae (Arbuscular mycorrhizae)
The transfer of pollen from an anther to a stigma is known as?
Pollination
Name the 3 fruit dispersal mechanisms
Water, wind, and animals
The two major classes of light receptors are?
Blue-light photoreceptors and Phytochromes
Name the 9 Macronutrients that are essential for plants
Carbon, Oxygen, Hydrogen, Nitrogen, Phosphorus, Sulphur, Potassium, Calcium, and Magnesium
Along a legume's roots are swelling called nodules, composed of plant cells "infected" by nitrogen-fixing bacteria known as?
Rhizobium
Each of the four microspores undergoes mitosis, each producing a two-cell gametophyte that contains which two types of cells?
Generative and tube cells
A generative cell forms 2 sperm, and the tube cell produces a pollen tube
Fruits can be calssified by their development. Name the four types of fruits based on their development.
Simple (single or several fused carpels- Peas)
Aggregate (single flower with multiple separate carpels- Raspberry)
Multiple (a group of flowers, inflorescence - Pineapple)
Accessory (fruit that contains other floral parts in addition to the ovaries- Apple)
These proteins activate plant defenses by triggering signal transduction pathways
R proteins (disease resistance genes)