On getting signal from the brain the muscles contract as the body pulls calcium from the blood to the muscle cells. Calcium binds with troponin drawing it out of its position and tropomyosin follows troponin as these two proteins are linked together. On movement of the troponin and tropomyosin, actin and myosin activation occurs and they move towards each other thus contracting the muscle. Therefore, free calcium is required for muscle contraction.
A. <span>embryo, infant, child, adolescent, adult.
An embryo is the first stage of life, inside the mother. Infant is right after the baby is born. Child, adolescent and adult come next. Hope this helps!</span>
A. Basalt
Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown is about two inches (five centimeters) across. Diorite is a coarse-grained, intrusive igneous rock that contains a mixture of feldspar, pyroxene, hornblende, and sometimes quartz.
Answer:
Selective breeding combines ideal traits of animals to replicate in offspring
Explanation:
Selective breeding is the process which involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. It is also known as artificial breeding and provides both plants and animals with greater variation and higher chances of survival. Selective breeding can be used to produce plants with bigger and tastier fruits and vegetables, crops with greater resistance to pests and diseases, and bigger animals that can be used for meat or milk production. The process of selective breeding is of great importance to the farmer today as it has brought about greater economic advantages.
In the instance of the black-breed boar and the white-breed sow being matched for mating, the reason is to combine these desirable traits in their offspring. The black-breed boar produces quality meat while the white-breed sow has quality fertility. Mating between these two breeds will produce offspring which has both traits of quality meat production as well as quality fertility.
Metabolism
Reproduction
Homeostasis
