Root hair development is under the control of two genes that code for transcription factors. Indicate whether the statement is true or false
True
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In the acid-base reaction described in the preceding paragraph about Nakano's research on RNAs, a proton (H+) is being transferred. What is acting as the proton acceptor?
A) cytosine B) magnesium hydroxide C) the virus D) cytosine, magnesium hydroxide, or the virus
In a grasshopper, how does ion composition of pre-urine compare to hemolymph?
A) Pre-urine is significantly higher in osmolarity (especially with respect to Na+ and K+). B) Hemolymph is higher in osmolarity, conserving its Cl-. C) Pre-urine is similar to hemolymph in ion composition. D) The protein pumps and channels of the Malpighian tubules concentrate Cl- in the pre-urine.
Which of the following are long cylindrical structures that lie parallel to the muscle fiber?
a. myofibril b. sarcolemmas c. myofilaments d. sarcomeres
Scientists discovered that the primary reason leaves either develop as simple or compound is related to
A. whether auxins are moving in the stem tip. B. whether the KNOX gene is active or not active. C. how fast the KNOX gene arrives at the primordium. D. the protein PHANTASTICA and its interaction with auxins. E. where the leaf primordium is positioned.