Answer:
The correct answer will be option-D.
Explanation:
Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.
Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.
This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.
Thus, option-D is the correct answer.
Answer:
Option A
Explanation:
Thyroid is primarily caused by lack of iodine but there are other reasons as well that lead to increased size of the thyroid gland. Some of these reason is
a) over- or underproduction of thyroid hormones
b) Nodules in the glans
Some times, due to overstimulation immune system itself attack the thyroid gland thereby producing excess thyroxine and hence causing the thyroid to swell
Thus, Option A is correct
The correct answer to this question is a: metamorphosis. Many
insects take on multiple forms through different parts of their lifecycle. For
example, many lepidopteran species (i.e., butterflies) include a caterpillar
juvenile stage. To reach the adult stage, the juvenile stage has to go through
metamorphosis, where its adult form is strikingly different from its juvenile
form.
The merger between Famous Players-Lasky and Balaban & Kat resulted in the first production-distribution-exhibition firm with a truly national theater chain.
- Famous Players-Lasky in collaboration (merged) with Balaban & Katz that was a chicago-based theater chain who had a lot of large auditoriums in the Midwest.
- The merger brought about the first production distribution-exhibition firm with a truly national theater chain. It was later named Publix Theaters. Paramount-Publix became the firm's name.
Conclusively, we can say that the merger between Famous Players-Lasky and Balaban & Kat resulted in the first production-distribution-exhibition firm with a truly national theater chain.
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