D bc active transport is basically the opposite of osmosis and diffusion
<span>penis development; voice change</span>
B. tiny algae and plankton decomposed under conditions of heat, pressure, and low oxygen.
Explanation:
Oil is most likely to form where tiny algae and plankton decomposed under conditions of heat, pressure and low oxygen.
Coal will form when plant materials like twigs, leaves and tree trunks decomposed under conditions of heat, pressure and low oxygen.
- To form oil, algae and plankton will be gathered with sediments in a basin.
- Rapid burial causes the algae and plankton to be cut off from aerobic environment that would lead to the decay of these organisms.
- They are buried alive and as the basin subsides, temperature and pressure acts to produce kerogen.
- Further cracking produces oil and gas.
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Answer:
on channel-linked receptors, G-protein-linked receptors, and enzyme-linked receptors.
The ability of cells to communicate through chemical signals originated in single cells and was essential for the evolution of multicellular organisms. In multicellular organisms, cells send and receive chemical messages constantly to coordinate the actions of distant organs, tissues, and cells. Cells can receive a message, transfer the information across the plasma membrane, and then produce changes within the cell in response to the message. Single-celled organisms, like yeast and bacteria, communicate with each other to aid in mating and coordination. Cellular communication has developed as a means to communicate with the environment, produce biological changes, and, if necessary, ensure survival.
In order to conduct a research you should have an dependent variable, independent variable and the control variable. so in order to study phototropism, then you should need sun light and the growth of the plant and you must have a control that why you need a dark room.
