Ethologist Konrad Lorenz raised geese from eggs and the first thing the goslings saw was him. Consequently, the goslings treated him as if he were their parent and followed him. This is an example of
A. sculpting.
B. imprinting.
C. nonassociative learning.
D. classical conditioning.
E. operant conditioning.
Answer: B
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In the nitric oxide signaling pathway, nitric oxide activates an enzyme that can convert many molecules of GTP into molecules of cGMP. cGMP is a small molecule that can diffuse through the cytoplasm and bind to an enzyme called protein kinase G (PKG). Binding of cGMP to PKG leads to a change in the confirmation of PKG that leads to its activation. What type of signaling molecule is cGMP?
A. Scaffold B. Adapter protein C. Second messenger D. Enzyme
You have been given a plant sample and asked to identify a specific tissue. Upon investigation, you find the cells are all long in length and some of them have small pores. They all contain fluid. You test the fluid using various biochemical tests and discover the fluid contains an abundance of disaccharides. What type of tissue are you looking at?
A. xylem B. phloem C. root hair cells D. sclerenchyma E. meristematic 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 cellular compostition of different types 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
A cell's DNA molecules contain its genetic material. An offspring born with altered DNA due to radioactivity, cosmic rays, or errors in reproduction
a. is called a mutant. b. is called a new species. c. is more likely to survive than if its DNA were not altered. d. is no different than if its DNA were unchanged. e. will never be able to reproduce itself.
The human heart contains cells that do all of the following EXCEPT
A) contract. B) create new red blood cells. C) generate electrical signals. D) respond to signals from the nervous system.