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Suppose you plant a seed and observe that a tree of large mass grows from it. The tree achieves a final mass that changes very little for years afterward. Which of the following is true about the tree
1. Both anabolic and catabolic reactions took place in the seed and tree when it was young and growing, but then all reactions stopped when the tree reached a stable mass.
2. Both anabolic and catabolic reactions took place in the seed and tree when it was young and growing, and both continue now even though the tree reached a stable mass.
3. Only anabolic reactions took place in the seed and tree when it was young and growing, and only catabolic reactions continue now that the tree reached a stable mass.
4. Only catabolic reactions took place in the seed and tree when it was young and growing, and only anabolic reactions continue now that the tree reached a stable mass.
An enzyme is discovered that selectively shortens telomeres. Its gene is isolated, cloned and transfected into a malignant cell line where it is transcribed and translated.
Does Chinese crocodile lizard communicate are these animals endangered or threatened if yes why are there number decreasing or is there population stable.
You discover a new virus and you analyze the nitrogenous base content of its genome. The virus contains 23% Adenines, 28% Thymines, 13% Guanines, and 36% Cytosines. Does this agree with Chargaff's rules? How is this possible? How would you propose..
Considering non-vascular plants, describe the evidence that suggests that they were likely the first terrestrial plants. Which group of the nonvascular plants is the most primitive, and why? Be desciptive as possible.
Explain the nonspecific antimicrobial effects of mucus, lysozyme, and low pH. For each of these substances, list where they are found in the body and how they function in fighting pathogens.
At the present we know that over 99 percent of the time, glucose occurs in the closed-ring form. What likely difference between these forms would give chemists a clue that the open-chain form was not present.
Why are some bacteria resistant to the effects of penicillin? How would you genetically engineer a strain of anthrax to be resistant to penicillin?
q1. an alien dna- like molecule is isolated from frozen remains of a life- form found beneath the martian polar ice
How many grams of methane should be combusted to heat 1.30 of water from 24.0 to 92.0, assume as product and 100 percent efficiency in heat transfer.
Scientists surmise that an early charophyte-like alga is theancestor of land plants. Starting with bryophytes, describespecific features that evolved in this group of plants that allowedfor a move to land.
In maize the genes Pl for purple leaves (dominant over green leaves); sm for salmon silk ( recessive for yellow silk) and py for pigmy plant (recessive to normal size) are on chromosome 6 at positions 45, 55 and 65 respectively. Predict the propor..
What is the purpose of the long refractory period during cardiac muscle contraction (compared to that of skeletal muscle)? What could happen if cardiac muscle did not have this long refractory period? Explain.
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