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Floral Organs and Structure
Flower Signal and Transduction
Responses to Light
Animal Form
Challenge Mix
100
This item encloses and protects the floral bed before it opens and is usually green and more leafy in appearance
what is a sepal
100
How can a stimulus cause a response?
An organism must have cells with appropriate receptor, a molecule affected by the stimulus
100
what are the two major classes of light receptors
1. blue light photoreceptors 2. phyochromes
100
How is the body plan of a animal formed?
It's the result of a pattern of development programmed by the genome, itself the product of millions years of evolution
100
12) Interstitial fluid is A) the fluid inside the gastrovascular cavity of Hydra. B) the internal environment inside animal cells. C) identical to the composition of blood. D) the route for the exchange of materials between blood and body cells. E) found only in the lumen of the small intestine.
D) the route for the exchange of materials between blood and body cells.
200
What are flowers typically composed of? What are these items separated by?
Flowers are composed of four whorls of modified leaves called floral organs which are separated by short internodes
200
What is the name of the protein involved in de-etiolation? Where is the protein found in de- etiolation located?
Protein name- phytochrome location- cytopalsm
200
The chromophore of a phytochrome is photoreversible. What is the equation that represents this? Explain
Pr = Pfr/ PR because it absorbs red (R; 660 nm) light. PFR because it absorbs far red (FR; 730 nm) light. These are the relationships: Absorption of red light by PR converts it into PFR Absorption of far red light by PFR converts it into PR. In the dark, PFR spontaneously converts back to PR.
200
What are the components of excretory and integumentary organs?
Excretory: kidneys,ureters, urinary bladder, urethra Integumentary: skin and it's derivatives
200
21) Coordinating body functions via chemical signals is accomplished by A) the respiratory system. B) the endocrine system. C) the immune and lymphatic systems. D) the integumentary system. E) the excretory system.
B) the endocrine system.
300
What are the key traits of the angiosperm life cycle
Remember the three F's FLOWERS double FERTILIZATION FRUITS
300
What is the major functions of abascisic acid,cytokinins and brassinosteriods? Where are they located?
Abascisic acid- functions in phototropism and gravitropsim location= shoot apical meristems and young leaves Cytokinin-regulate cell division in shoots and roots location=synthesized in roots Brassinosteriods- promote cell expansion location=compounds are in all plant tissues
300
What is photoperiodism
The environmental stimulus that plants use most often to detect the time of the year is the photoperiod, the relative lengths of night and day. A physiological repsonse to photoperiod is photoperiodism
300
What is the purpose of a epithelium
It is the cells of an epithelial tissue that forms active interfaces with the environment
300
4) A flowering plant with a deleterious mutation in microsporogenesis would most likely A) fail to produce sepals. B) fail to produce petals. C) fail to produce anthers. D) fail to produce pollen. E) fail to produce ovules.
D) fail to produce pollen.
400
What is the difference between complete and incomplete flowers?
Complete flowers have all basic floral organs while incomplete flowers are missing them.
400
What is senescence?
It refers to all of the changes that take place in a plant that will finally lead to the death of cells, tissues, and, eventually, the whole plant body. *Programmed death
400
What is thigmomorphogensis?
refers to the changes in form that result from mechanical perturbatation
400
Give an example on negative feedback
When you exercise vigorously, you produce heat, which increases body temp. Your nervous system detects this increase and triggers sweating. As you sweat, the evaporation of moisture from your skin cools your body, helping your body return to its set point
400
8) Which of the following is the correct sequence during the alternation of generations life cycle in a flowering plant? A) sporophyte → meiosis → gametophyte → gametes → fertilization → diploid zygote B) sporophyte → mitosis → gametophyte → meiosis → sporophyte C) haploid gametophyte → gametes → meiosis → fertilization → diploid sporophyte D) sporophyte → spores → meiosis → gametophyte → gametes E) haploid sporophyte → spores → fertilization → diploid gametophyte
A) sporophyte → meiosis → gametophyte → gametes → fertilization → diploid zygote
500
Explain/ Describe the development of male gametophytes in pollen grains
Pollen grain (microspore) transferred to the stigma of the flower develops into male gametophyte. Its nucleus divides to form a vegetative nucleus (tube nucleus) and a generative nucleus. This division takes place even before the pollen reaching the stigma. The division results in two unequal cells.
500
If protein synthesis was blocked in etiolated cells, what would be necessary for any de-etiolation to occur?
post-translational modification of existing proteins
500
The signaling molecule for flowering might be released earlier than normal in a long day plant exposed to flashes of what?
red light during night
500
Evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment include: A) a gastrovascular activity, a two-layered body, and a torpedo-like body shape. B) an external respiratory surface, a small body size, and a two-cell-layered body. C) a large body volume; a long, tubular body; and a set of wings. D) complex internal structures, a small body size, and a large surface area. E) an unbranched internal surface, a small body size, and thick covering.
B) an external respiratory surface, a small body size, and a two-cell-layered body.
500
36) What is the difference between pollination and fertilization in flowering plants? A) Fertilization precedes pollination. B) Pollination easily occurs between plants of different species, whereas fertilization is within a species. C) Pollen is formed within megasporangia so that male and female gametes are near each other. D) Pollination is the transfer of pollen from an anther to a stigma. Fertilization is the fusion of haploid nuclei. E) If fertilization occurs, pollination is unnecessary.
D) Pollination is the transfer of pollen from an anther to a stigma. Fertilization is the fusion of haploid nuclei.