Which types of plant cells function like stem cells in animals? How do they function?
What will be an ideal response?
ANSWER: Initials are the daughter cells of a dividing apical meristem cell. This initial remains part of
the meristem. A derivative, the other daughter cell, becomes the source of specialized cells.
Initials are continually resupplied in the meristem.
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One of the major causes of the endangerment of giant pandas is ____
a. habitat loss and fragmentation b. increasing the effects of chemical pollution c. a sexually transmitted disease that plagues the giant pandas d. introduced exotic species into giant panda habitat e. the excess withdrawal of water from their habitat
Answer the following statements true (T) or false (F)
1. A dehydration reaction that builds larger molecules from smaller units requires the addition of a water molecule. 2. The hydroxyl (OH-) concentration of a solution with a pH of 8 would be 10-6 molar. 3. Most enzymes or bioactive molecules work effectively within a broad range of pH. 4. The presence of salt helps prevent oceans from freezing.
A lab technician is preparing to dispose of a rat and a frog that were euthanized earlier in the day for a scientific study. Although the two animals died at the same time, the rat has rigor mortis while the frog does not yet show any signs of it. What is the best explanation for this time difference in the onset of rigor mortis?
A. The rat has higher concentrations of myoglobin in its muscles than the frog. B. All the frog's muscles are fast-twitch muscles. C. The rat's muscles have a greater density of myofilaments than the frog's muscles. D. The frog has lower concentrations of glycogen in its muscles than the rat. E. The rat is able to synthesize more ATP than the frog. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about rigor mortis? 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?
A hominin of Europe and Asia that became
extinct nearly 30,000 years ago was a. a dryopith. b. Australopithecus. c. Homo erectus. d. Homo neanderthalensis e. Homo floresiensis.