Biology, 17.07.2019 11:00 ghari112345
Me fast , you (: scientists find evidence that the genes involved in tooth development exist in chickens, even though chickens do not normally develop teeth. the formation of teeth in chickens can be controlled by introducing a virus into chicken embryos that "turned on" their tooth-developing gene. they find that the beaks of the virus-modified chicken embryos contain cone-shaped teeth similar to embryonic crocodile teeth. which of the following best describes the conclusion that can be drawn from this experiment? a as bird evolution continues, birds like chickens will develop teeth like dinosaurs and reptiles. b the growth of teeth in chickens supports the hypothesis of a common ancestor between birds and reptiles. c the chickens with teeth are more closely related to crocodiles than they are to regular toothless chickens. d with enough genetic engineering, chicken embryos can develop into reptiles like crocodiles.
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Biology, 22.06.2019 00:10
Body systems are not completely independent they integrate and work together describe one example of the integration between body systems
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Biology, 22.06.2019 12:10
Which is the most likely reason the writer of the play pygmalion chose to change the character of galatea from a statue to working-class woman?
Answers: 1
Biology, 22.06.2019 13:20
Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains Ξ±-bungarotoxin).
Answers: 2
Me fast , you (: scientists find evidence that the genes involved in tooth development exist in ch...
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