Biology, 15.04.2020 04:52 leslie1811
The process that results in the formation of different cell types occurring through selective changes in genetic activity that causes some genes to be turned off, while others are turned on is called .
A. fertilization
B. conception
C. development
D. differentiation
Answers: 1
Biology, 21.06.2019 13:30
Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward
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Biology, 22.06.2019 01:30
In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.
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Biology, 22.06.2019 06:00
Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this
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Biology, 22.06.2019 13:00
This is a biological reaction due to a stimulus. i need this quickly !
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