They can distinguish whether the entity is living or non living by checking whether they have all the seven characteristics of living things.
These 7 characteristics include:
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition.
If the entity does show all these seven characteristics, it should be a living organism.
In the past, scientists by using these 7 characteristics, they sorted living things in 5 kingdoms(plus virus), each with their own other characteristics.
<span>They lose the ability to gain nutrients.
Hence, people with celiac disease cannot tolerate gluten. Gluten is a type of protein found as nutrient in food and is released to the digestive system. When the body receives food that contains gluten (e.g. wheat, rye, and barley) the immune systems responds and attacks the small intestines. In the event of this, the linings of the small intestine called villi are damaged. When the villi get damaged, the body cannot properly absorb nutrients. </span>
The answer is: [D]: hydrochloric acid (HCl).
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Hydrochloric acid (HCl) contains no carbon atoms; therefore it is NOT an organic molecule.
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Answer:
d. the movement of myosin head while attached to actin myofilament
Explanation:
During muscle contraction, the calcium ions released from the sarcoplasmic reticulum in the sarcoplasm bind to troponin which in turn removes tropomyosin from the myosin-binding sites present on the actin. Hydrolysis of ATP at the myosin heads energize them. These myosin heads with stored energy bind to the myosin-binding sites on the actin filaments. In their bound conditions on the actin filaments, myosin heads are called cross bridges. Only one myosin head of a single myosin molecule forms cross-bridge at a time.
The correct answer for this question is (A) Groups of cells form tissues.
In multicellular animals, a group of similar cells alongwith inter-cellular substances perform a specific function. Such an organization is called tissue. All complex animals consist of only four basic type of tissues. These tissues are organized in specific proportion and pattern to form an organ like stomach, lung, heart and kidney. When two or more organs perform a common function by their physical and/or chemical interaction , they together form organ system, eg., digestive system, respiratory system, etc. Cells, tissues, organs and organ system split up the work in a way that exhibits division of labour and contribute to the survival of the body as whole.
