Answer:
prostaglandins
Explanation:
Prostaglandins are eicosanoids (i.e. lipids) derived from arachidonic acid and related fatty acids. Prostaglandins are synthesized by many tissues in the body when they are damaged or infected in order to deal with such injuries/infections. They are hormone-like compounds involved in pain and inflammation. It is well known that the levels of prostaglandins change in the menstrual cycle of women, producing vasoconstriction of the endometrial vessels during menstruation and contraction of the muscles in the myometrium. High prostaglandin levels are characteristic of severe menstrual cramps.
a.... cannot be replaced in a reasonable amount of time
Meiosis occurs in only the sexual cells of the body (sperm/eggs). It produces the sex cells. (eggs in females, and sperm in males)
hope i could help
Answer:
All of these choices are correct.
Explanation:
Before the discovery of DNA as genetic material, proteins were considered to be the biomolecules that store genetic information. Proteins are present in all the cells. They are present in the form of complex secondary and tertiary structures. Proteins are involved in almost all cellular processes in the form of enzymes. Proteins present in the cell determine the phenotype of organisms. Therefore, the complex structures of proteins were supposed to be the carrier of the genetic information.
On the other hand, the linear structure of DNA was considered to be too simple to serve as a carrier of genetic information. Also, DNA molecules do not directly determine the phenotype and are not directly involved in a number of cellular processes. So, DNA was not considered to be a molecule to serve as genetic material in the early 1940s.
Answer:
Lets be clear, in an inertial frame of reference it will take 1 newton to move 1 kilogram 1 meter in one second(roughly). 1 joule in that newton, 1/speed of light = incremental mass increase( irrelevant) . So, to move 1 kg of mass 1 meter in 0.00000003 seconds would take 300,000,000 joules(fun).
That divided by speed of light again and your 1kg mass is now 2 kg. Now to move 2 kg 1 meter would take more energy than previously. More energy (newtons) the more relativistic mass gained and thus more energy required to move faster. This is why we cant reach the speed of light - infinite energy. ( again irrelevent to the Question).
But in your question you said lift. Lift is a term that I would find on earth, in a gravity well, so moving that same 1kg of mass wouldn't take 1 newton because the gravitational force pulls the mass down, causing a force called weight - this would be 9.8 N x Mass at sea level. So to lift this 1kg mass will take more than 9.8 N. 10 newtons of life would create a net force of 0.2 N so 0.2/1 = 0.2 meters acceleration.
Note that, gravitational force is one side of the same coin, with acceleration on the other. We talk of gravitation in terms of acceleration, as two masses that are not identical will always fall at the same acceleration. Gravity isn't a force, its a four dimensional field that curves linear paths toward attracting bodies - this is how we are able to orbit objects in space.