A seed is often described as, "a baby plant in a box with its lunch." Explain this statement using the appropriate terms
for baby plant, box, and lunch.
What will be an ideal response?
ANSWER: A seed has a "baby plant" called an embryo, which is the developing sporophyte. It is
surrounded by its "lunch," food supplies in the form of nutritive tissue such as endosperm.
The embryo and the nutritive tissue are in a "box," hardened tissue called a seed coat that
protects the embryo from drying out.
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The formulation of a model for a structure or for a process serves which of the following purposes?
A) It asks a scientific question. B) It functions as a testable hypothesis. C) It records observations. D) It serves as a data point among results. E) It can be arrived at only after years of experimentation.
Answer the following statement(s) true (T) or false (F)
1. An application of too much fertilizer will negatively affect the movement of materials in the phloem. 2. A decrease in the availability of ATP in a root cell could decrease the water potential of the cell. 3. If a mutation decreased the radius of a xylem vessel threefold, there would be an 81-fold increase in the volume of liquid moving through the vessel. 4. An increase in root pressure will result in the rapid release of abscisic acid (ABA) and the subsequent opening of the stomata. 5. If the proton pumps of guard cell were damaged, transpiration would decrease.
While running in a garden, a girl steps on an old board and a nail goes through her shoe and skin, causing a deep
puncture wound. Which non-specific defense mechanism will aid in protecting her from pathogens?
a. ciliated epithelial cells b. lysozyme c. acidic skin secretions d. inflammation e. cytotoxic T cells
Four of the following are major features of arthropods. Which is the exception?
a. jointed appendages b. exoskeleton c. paired segmental nephridia d. specialized segments that are fused together e. specialized sensory structures