Which of the following is an advantage of the human circulatory system over the circulatory system of tarantulas?
a. The human system functions under lower pressure.
b. The human system requires less energy to operate.
c. The human system allows direct contact between tissues and blood.
d. The human system can direct the relative amount of flow of blood to different organs.
e. The human system permits more rapid exchange of gases between respiratory pigment and tissues.
D; Closed circulatory systems operate under higher pressure, requiring harder work by the heart, and resulting in faster movement of blood. Because the blood is contained in the vessels, the system can open some vessels, and constrict others, to regulate the relative amount of blood delivered to various parts of the body. Since blood does not directly contact the tissues, the gases must pass through the wall of the vessels during exchange between blood and tissue (choice e).
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Endosperm is found in:
A. angiosperms B. gymnosperms C. ferns D. mosses E. horsetails
You are given a sample of plant tissue and asked to identify the type of tissue and its location in the plant. Using your microscope, you notice two distinct layers of cells. One layer contains cells that are tightly compacted together while the other layer has loosely arranged cells. The cells in both layers contain many chloroplasts. Based on this information, you determine the tissue is
A. mesophyll tissue from a leaf. B. ground tissue from a stem. C. vascular tissue from a leaf. D. mesophyll tissue from a stem. E. vascular tissue from a root. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the shape, characteristics, and arrangement of plant cells? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Is a mutation more likely to be lethal if it impacts early or late stages in development? What will be an ideal response?
In mitosis, three major check points are built into the cell cycle. These checkpoints make sure that certain criteria are met before proceeding to the next step
Explain the major responsibilities of the checkpoints between the following steps: between G1 to S, between G2 to mitosis, and between metaphase to anaphase.