Daily NEET MCQ- August 18, 2022 - NEET MCQ

In the early 1800s, a German chemist named Dobereiner came up with the idea of classifying elements as per their properties. LAter in 1829, he noticed a similarity in triads (a group of 3 elements). This is how he classified.

According to Dobereiner, in triads, the average weight the 1^st and the 3^rd element are equal to the second one. Li, Na, and K; Ca, Sr and Ba; CL, Br and I satisfy the above conditions. But He, Na and Ar don’t follow the law of Dobereiner Triads.

In the year 1865, an English chemist named John Alexander Newland proposed the law of octaves. It stated that when elements are arranged in their increasing atomic weights, the property of every eight elements is similar to that of the 1^st element.

Instantaneous velocity describes the velocity of an object at a given time instant. Average speed is the speed at which the object travels throughout the time period and not an instant. Speed is a scalar quantity; hence it cannot show the direction of motion.

The function for velocity can be derived by differentiating the equation with respect to t. v = 2(t-4) is the required function. When t = 5, v = 2(5-4) = 2.

The instantaneous velocity will increase with time. If the motion is accelerated, no matter if the acceleration is constant, or variable, the instantaneous velocity will increase. Variation of acceleration describes how to change in velocity is changing.

Fungus reproduces through asexual mode during favourable conditions and opts sexual mode of reproduction only during adverse situations. Budding, fragmentation and spore formation are different modes of asexual reproduction. Zoospores and zygospores are produced by phycospores for asexual and sexual odes of reproduction respectively.

The word “karyo” means nucleus and “gamy” means fusion. Therefore the word “karyogamy” refers to the fusion of nuclei. In the sexual cycle of fungus to form spores, plasmogamy is followed by karyogamy and then by meiosis.

The word “coeno” means common and “cytic” means cytoplasm. Therefore the word “coenocytic” means sharing of common cytoplasm. Aseptate fungi have multiple nuclei in a common cytoplasm.

The volume of air involved in breathing movements can be estimated by using a spirometer which helps in clinical assessment of pulmonary functions. It measures the amount of air inspired or expired by an individual.