A desert would be a good example because there is no exact source of water there unless you are in a specific one.
<span>The most closely related organism of genus species is Nerodia spedon and Nerodia fasciata, because they both water snake, from southern and northern part of america. And they came from large species, nonvenomous, native snakes, and aquatic type of snakes.</span>
<span>c. they secrete hormones that help control the ovarian cycle.
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Answer: The correct option is d. the improvement of the microscope and microscopic techniques.
In the 1600s the development of cell theory was led by advances in microscopy. The cell theory is historic in terms of scientific theory. According to the theory it was proposed that all living organisms are made up from cells, cell is the basic structural unit in all the organisms and new cells arise from pre-existing cells. The continuous improvement of microscopy with time and advancements in magnification technology were enough for discovering the cells and contributed the most towards the cell theory.
Answer Active transport is usually associated with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.
Explanation: