Seth made a table comparing the functions of different physical structures Here are straightforward step-by-step explanations for the General Science (Solutions) for Class 7 Science Chapter 2: Plants: Structure and Function solutions. These Plants: Structure and Function solutions are very well-liked by Class 7 students studying science. Plants: Structure and Function solutions are helpful for speedily finishing your assignments and getting ready for tests. You may get all the questions and solutions from Class 7 Science Chapter 2's General Science (Solutions) Book for free here. You'll enjoy Meritnation's General science (solutions) Solutions's ad-free experience as well. Class 7 Science General Science (Solutions) Solutions are prepared by professionals and are 100 percent accurate.
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Answer:
c) thin filaments slide past thick filaments towards the M line
Explanation:
Each muscle fiber has many myofibrils composed of many sarcomeres which have thick and thin filaments. Thick filaments are made of myosin protein whereas thin filaments have actin protein. There are various bands and zones in a sarcomere like A band, I band etc. H zone consists of only thick filaments. It has a central vertical line called as M line where the accessory proteins hold together the thick filaments.
According to sliding filament mechanism, sarcomere must shorten for muscle to contract. However sarcomere shortening is not caused due to shortening of thick and thin filaments. Instead they slide over each other towards the M line which leads to shortening of sarcomere without changing the length of filaments. The sliding is caused by forming of cross bridges between actin and myosin proteins.
<span> I think Sea otters are an iconic species, representing the beauty and diversity of marine life found along California’s coastline. They’re also considered a keystone species because of their critical importance to the health and stability of the nearshore marine ecosystem. They eat sea urchins and other invertebrates that graze on giant kelp. Without sea otters, these grazing animals can destroy kelp forests and consequently the wide diversity of animals that depend upon kelp habitat for survival. Additionally, kelp forests protect coastlines from storm surge and absorb vast amounts of harmful carbon dioxide from the atmosphere. Sea otters are also considered a sentinel species because their health reflects that of California’s coastal waters.</span>
B, <span>a police officer who allows select people to enter and leave a crime scene. Please give brainliest.</span>
Natural selection is where certain organisms adapt better and make offspring.
-Steel jelly
