Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract. This is opposed to other components or tissues in muscle such as tendons or perimysium. It is formed during embryonic development through a process known as myogenesis.
Explanation:
Development happens quickly during the prenatal period, which is the time between conception and birth. This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage.
First or the germinal stage- time span: conception at two weeks
development that occurs: the key steps in establishing a pregnancy
Second or the embryonic stage - time span: third through eighth week
development that occurs: the face, eyes, ears, limbs and bones begin to form
Third or the fetal stage- time span: eighth or ninth week through birth
development that occurs: the vocal cords develop, and the digestive system and kidneys begin to function. spontaneous or unplanned, movements are possible by the end of the third month
<span>1. Big bang Theory suggests the origin of the universe started with an explosion and expansion of a very hot, dense, compact fireball.
It is a theory that stated that the universe originated from a single point in space or singularity. Despite the name, the universe was not born from an explosion. Rather, it was born from the continuous expansion of the single hot dense state, eventually cooling down which allowed more forms of matter to form.
2. Steady state Theory about the origin of the universe that suggests the universe has and will continue to be at a steady, continuous state.
The steady state theory suggests that the universe expands continually but maintains a constant average density even when matter is being created continuously. It suggests also that as new stars and galaxies are formed, they continue to form at the same rate older stars and galaxies become unobservable.
3. Oscillating Universe Theory </span>about the origin of the universe that suggests the universe is a never-ending cycle of expansion and contraction.
Also known as the cyclic model, proposed by Richard Tolman. It proposes that when the expansion of the universe will end, it will go through a contraction phase where it will grow hotter and brighter as it contracts and eventually crush out of existence.
4. Nebular Theory about the origin of the solar system that suggests our Sun and planets formed from a cloud of dust and gas.
The nebular theory suggests that the solar system evolved from a nebula that contracted. It spun faster and faster till it flattened out forming a disk. As it continued to spin, it became denser and hotter till the sun eventually formed.
5. Inflation Theory that upholds the big bang Theory but suggests there was an extremely rapid expansion or inflation milliseconds after the big bang.
This theory proposes that there was a period where the universe expanded exponentially before the Big Bang expansion. It was developed by Alan Guth, Andrei Linde, Andy Albrecht and Paul Steinhardt. It is now considered as an extension to the Big Bang Theory.
6. Condensation Theory about the origin of the solar system that agrees with the nebular theory but stresses the importance of interstellar dust in planet formation.
This theory is considered as an extension to the Nebular theory.It emphasizes that interstellar dust is a key ingredient to the formation of the different planets in the solar system. It proposes that the interstellar dust grains acted as condensation nuclei.
All of this extra carbon needs to go somewhere. So far, land plants and the ocean have taken up about 55 percent of the extra carbon people have put into the atmosphere while about 45 percent has stayed in the atmosphere. Eventually, the land and oceans will take up most of the extra carbon dioxide, but as much as 20 percent may remain in the atmosphere for many thousands of years.
The changes in the carbon cycle impact each reservoir. Excess carbon in the atmosphere warms the planet and helps plants on land grow more. Excess carbon in the ocean makes the water more acidic, putting marine life in danger
4) A change in the proteins that express the normal trait.