Genetic material (DNA and RNA) are found in three distinct organelles in eukaryotic cells. What are these organelles and which type of relationship may have lead to their formation?
A. mitochondria, chloroplast, nucleus, parasitic
B. lysosomes, mitochondria, chloroplast, parasitic
C. nucleus, Golgi body, endoplasmic reticulum, symbiotic
D. chloroplast, mitochondria, nucleus, endosymbiotic
E. chloroplast, lysosomes, nucleus, endosymbiotic
Answer: D
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The distinctive feature of chloroplasts is that they contain a green pigment called:
A. Gram stain. B. chlorophyll. C. hemoglobin. D. chromatin. E. keratin.
Which of the following statements is true regarding the systemic acquired resistance (SAR) response in plants? Select all correct choices
A. It is pathogen-specific. B. It relies on salicylic acid. C. It is only effective against biotrophic pathogens. D. It requires dead tissue.
Lampreys completely lack parathyroid glands. Suggest why these glands may be important for other vertebrates, but not for jawless fish.
A. Because they are parasitic, lampreys get plenty of calcium from their hosts. B. Living in the ocean, they are surrounded by large amounts of sodium, chloride, and magnesium ions. C. Jawless fish employ a different system than other vertebrates to regulate blood sugar. D. Since they have a cartilaginous skeleton but not true bone, they have less need to regulate calcium levels. 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 the parathyroid gland? 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?
Place the five steps of digestion in most animals with a digestive tube in the proper order
a. absorption ? enzymatic hydrolysis ? mechanical processing ? secretion of enzymes ? elimination b. absorption ? mechanical processing ? enzymatic hydrolysis ? secretion of enzymes ? elimination c. mechanical processing ? absorption ? secretion of enzymes ? enzymatic hydrolysis ? elimination d. mechanical processing ? secretion of enzymes ? enzymatic hydrolysis ? absorption ? elimination e. mechanical processing ? secretion of enzymes ? absorption ? enzymatic hydrolysis ? elimination