Explanation:
They are activated when GTP replaces the GDP and are inactivated when the intrinsic GTPase activity hydrolyzes the GTP.
At first glance cycads and palm trees look very similar. How are they distinguished? a. Cycads have cones, and palm trees, a gnetophyte, have single large fruits.
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Answer:
1. Plants utilize some of the incoming energy derived from photosynthesis for their own self-maintenance.
3. Plants and algae carry out both photosynthesis and cellular respiration.
5. Plants, algae, and cyanobacteria utilize light energy from the sun into their own biomass.
Explanation:
The gross primary productivity (GPP) of an ecosystem represents the rate at which the solar energy is captured during photosynthesis in a given period. Producers (plants, algae and cyanobacteria) perform cellular respiration to provide energy for their life processes. Cellular respiration consumes part of the total photosynthetic output. The energy available in tissues of producers after cellular respiration is called net primary productivity (NPP).
Therefore, NPP is the amount of biomass or the energy stored in the tissues of the producers for growth after cellular respiration for their normal daily activities and self-maintenance. So, NPP is always less than GPP.
Answer:
Choice B) Neuron, nervous tissue, brain, nervous system correctly orders four of these systems from most to least foundational.
After eating a meal high in calcium, blood calcium levels are returned to normal through the use of a negative feedback loop.
- Increased calcium levels in the serum serve as a negative-feedback loop signaling the parathyroid glands to stop the release of PTH.
- The mechanism of PTH in the body is intricate, and the clinical ramifications of irregularities are significant.
It involves regulation of the blood calcium level.
The parathyroid glands secrete parathyroid hormone, which regulates the level of calcium in the blood. If calcium decreases, the parathyroid glands sense the decrease and secrete more parathyroid hormone
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