Consider the structure of a trophic pyramid when answering the following questions:
As shown in Figure 25.16, animals only appear in the fossil record about 580 million years
ago, which coincides with atmospheric oxygen levels reaching a threshold needed by
animals to breathe. How did the evolution of photosynthetic and heterotrophic organisms
change over the last 2 billion years to support the diversity of life seen on Earth today?
What will be an ideal response?
Answers will vary
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Answer the following statement(s) true (T) or false (F)
1. A soil sample with a OH- concentration of 10-9 M may also have high levels of aluminum. 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 relationship between [OH-] and aluminum in the soil? 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? 2. As global temperatures increase, evidence suggests that ribulose 1, 5-biphosphate carboxylase/oxygenase (rubisco) is likely to denature and photosynthesis rates will decrease. 3. Saline soils have a higher water potential than plant roots. 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 how water potential is affected by saline soil? 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? 4. Most parasitic plants like other land plants have mycorrhizal symbionts. 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 how parasitic plants obtain nutrients? 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? 5. A nematode that has parasitized a plant has breached the cutin layer of the epidermis. 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 how nematodes infect plants? 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?
Communication signals are usually _____
a. intraspecific b. interspecific c. not helpful to the receiver d. visual e. auditory
What is the name given to the type of cartilage that is found in the disks between the vertebrae?
a. chondrocytes b. elastic c. compact d. hyaline e. fibrocartilage
Which of the following is an example of asexual reproduction in eukaryotes?
A) Prokaryotic fission in the bacterium E. coli B) Budding in the protistan Hydra C) Meiosis in plants D) The union of sperm and egg in sea urchins