Answer:
"A model that shows global systems, the processes that operate within each system and the ways those systems and processes interact."
Explanation:
In the global system mainly four types of models interact or co-ordinate between each other. When we take an example of the ecosystem, these four models can be predation, parasitism and herbivore. Interaction takes place in such a way that one model gets the benefits while the other one gets affected. But when talk about mutualism, both of them gets benefited from the interaction. The basis of the global system property is firstly made by the species interaction.
An enzyme is a biological molecule. They are essential to sustain life.
Answer:
B. Gravitational potential energy
Explanation:
An easy way to remember this is if something has the potential to fall from height, that medium will more than likely have gravitational potential energy.
Elastic EP is more so for when materials bend and warp, think of the energy in a stretched rubber band before you let it go
Vibrational energy is more along the lines of atoms and molecules which are constantly vibrating
Radiant energy is energy of electromagnetic waves, such as sunlight or radiation, etc
Answer:
The correct answer is option A) "True".
Explanation:
Paracrine hormones are a type of eicosanoids (signaling molecule), which are characterized for binding and performing its function on nearby cells rather than the cells where they are produced. Two examples of paracrine hormones are estrogens and testosterone. Estrogens are produced by the ovaries, but they perform their function on ovarian follicles. Testosterone is produced by the Leydig cells of the testes, but they perform their function on adjacent seminiferous tubules.
Answer:
Ultraviolet radiation leads to DNA mutations in the melanocytes, which are skin cells that contain melanin. Melanin level is inversely associated with the ability of skin cells to produce vitamin D
Explanation:
Ultraviolet (UV) radiation is a well-known environmental factor that causes mutations in the DNA of melanocytes, which are skin cells that produce melanin. Moreover, melanin is a protective pigment whose main function is to block UV radiation, thereby protecting the body from DNA damage and, consequently, from cancer (skin cancer). Abundant melanin levels can decrease the ability of the body to synthesize vitamin D, the only vitamin that can be synthesized with sunlight. In consequence, darker skin is associated with a higher risk of having vitamin D deficiency.