Phil is conducting a seed germination experiment. He places 3 groups of lettuce seeds in a 34º Celsius incubator with adequate moisture. One set of seeds is placed in a dark area with no light source. A second set is placed under artificial light and third set of seeds is placed in direct sunlight. This experiment is intended to test Phil's hypothesis that light is necessary for lettuce seed germination.Based on the experimental design, which variable was the dependent variable?
A. Temperature
B. Moisture
C. Type of light
D. Seeds in the dark
E. Germination rate
Answer: E
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Archaeons are not known to incorporate (fix) carbon dioxide.
Answer the following statement true (T) or false (F)
All life can be divided into _____ domains and _____ kingdoms
a. three; three b. four; four c. three; four d. four; three
Estrogen and testosterone are steroid hormones that differ by only a few atoms. The different receptor binding properties those differences confer allow the hormones to do what during development?
A. Cause differential maturation of the prefrontal cortex during late adolescence. B. Cause a slight increase in muscle mass in females versus males. C. Make females naturally attracted to pink and males to blue. D. Control development of all sex-specific physical traits including sex organs, body hair, and breasts. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about estrogen and testosterone? What other information is related to the question? Choose Answer Given what you now know, what information 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?
During the late winter, maple tree sap starts to flow from the roots towards the branches of a tree. Maple sap is composed of water and sugars. How is it possible for a maple tree to have glucose available in sap when the tree does not have leaves on its branches?
A) Glucose is produced in the roots and transferred throughout the tree during late winter. B) Glucose is stored in the roots over winter and flows within the tree when leaves and buds start to form. C) Glucose is absorbed by the root systems and can be first absorbed in late winter as the ground starts to thaw. D) Glucose is still produced during winter within the bark of the tree.