Answer:
Thermosphere – Oxygen-Warmer –Space Shuttle & Station Orbitals
Mesosphere –
Stratosphere –Jet Aircraft &Weather balloons fly
Troposphere – Water vapour & Dust Particles – Warmer upward
Explanation:
Thermosphere: The thermosphere is a layer of Earth’s atmosphere below the exosphere and above the mesosphere.It extends about 90 km to between 500 and 1000 Km The temperature is 200◦C. very hot in the day than night.
Mesosphere:It lies above the stratosphere and extend from 50 Km to 85 Km Jets and balloons do go high.
Stratosphere: It is second layer of the earth’s atmosphere starts above the Troposphere and ends 50 km above the ground.Ozone is abundant here which absorbs the UV radiation from the sun.
Troposphere:It is layer closes to the earth’s surface.It extends 7 -20km above the ground contains half of the atmosphere.All of the water Vapour and dust are in this layer.
Answer:
Natural selection leads to evolution when the people having certain characteristics posses the greater chance of survival than the others that are not adapted to the changes, these adapted characteristics are passed to the next generations. Hence, the correct answer would be ''Natural selection leads to evolution''.
Explanation:
The right answer is A.
Metabolic homeostasis is provided by a set of interactions between the central nervous system (CNS) and peripheral tissues. The CNS controls the periphery by regulating the fraction of energy that enters the body (caloric intake) and that which emerges from it.
To perform this role, the CNS receives signals from peripheral organs and provides information on peripheral metabolism, as well as the extent of the reserves available to the body.
Question: Which pituitary hormone causes liver cells to release somatomedins that increase the rate of uptake of amino acids by cells such as skeletal muscle fibers?
follicle-stimulating hormone
prolactin
thyroid-stimulating hormone
growth hormone
Answer:
growth hormone
Explanation:
Somatomedins are growth factors. The growth hormone makes the cells such as liver cells, skeletal muscles, bones, etc. to secrete the somatomedins. The somatomedins from the liver enter the bloodstream to reach the target cells. The somatomedins make the skeletal muscles, bones, etc. to absorb amino acids into the cells so as to facilitate protein synthesis. This growth factor also downregulates the breakdown of proteins. This is how growth hormone triggers the growth of muscles and soft tissues.
