Nucleus, The “brains” of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
It is intercepted first by the atmosphere, a small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. during the day the sun shines through tha atmosphere <span>
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Transcription takes place in three steps: initiation, elongation, and termination. The steps are illustrated in the Figure below. Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter.
Answer: 1800 centimeters is the largest measurement
Explanation:
1800 cm = 0.018 km
2.1 m = 0.0021 km
0.0017 km is the smallest
Answer:
A
Explanation:
There are different mechanisms for transport of molecules across the cell membrane. One kind of this transport is facilitated diffusion, this is a form of passive transport, not requiring any ATP (the opposite would be active transport, where it does require ATP.
Simple diffusion does require special transport proteins, and neither does osmosis. Filtration is a technique used for sterilisation of water, where any impurities can be drawn out of the liquid
