Answer:
c. Sarcomere
Explanation:
Sarcomere is one of the basic components of striated muscle that allows muscle contraction. That is, it is the contractile unit in the muscle cell.
The sarcomere is made up of a protein complex, the most important of which are actin and myosin. In the presence of Ca2 +, the ends of the myosin bind to nearby actin molecules and fold with great velocity. The actin filament then moves to the center of the sarcomere, triggering the approach of the two Z lines. This causes the sarcomere to shrink and, to a large extent, lead to contraction of the entire muscle.
<u>http://www.employees.csbsju.edu/ssaupe/biol121/chem_biol.htm</u>
that site should help
In biology, a life cycle<span> is a series of changes in form that an </span>organism<span> undergoes, returning to the starting state. "The concept is closely related to those of the </span>life<span>history, development and ontogeny, but differs from them in stressing renewal."</span>
Answer:
D.) If the homozygous tall plant (TT) crosses with a homozygous short plant (tt), then all the F1 plants become heterozygous tall plants (Tt).
Explanation:
Homozygous indicates that the alleles in the genotype are the same. Therefore, the genotype for homozygous tall plants is (TT) and the genotype for homozygous short plants is (tt).
After performing a cross, we know that all of the children will have the heterozygous genotype (Tt).
Answer:
Artificial reproduction such as embryo transfer is one reproductive technology that has been beneficial to the livestock producers. There are various methods by which artificial reproduction can be achieved:
- Artificial insemination: It is the process by which semen can be introduced into the females so that fertilization can occur.
- Embryo transfer: By this techniques embryos can be implanted into the female and reproduction be made possible.
These technologies benefit the producers by crossing those species which have better traits and can pass these traits to the offspring through these techniques.
