Daily NEET MCQ- June 25, 2022 - NEET MCQ

Cellulose is an organic material derived from plants. Hence they are degraded in nature by microorganisms. They are deposited in landfills and are converted into compost.

Recycling is the most useful method for plastic waste disposal as several waste materials can be used as raw materials to manufacture useful products again.

Biodegradable wastes are deposited in landfills and are converted into compost. These wastes mix with the soil and produce manure. Examples include paper, leaves and vegetable peels.

Amplitude = Ae^-bt/2m& Energy = 1/2kA²e^-bt/m. For amplitude to become half, e^-bt/2m = 1/2
Or bT/2m = ln(2)
Or T = 2m ln(2)/b For energy to become half, e^-bt/m = 1/2
Or t = m ln(2)/b = T/2.

Energy in presence of damping forces is given by: 1/2kA²e^-bt/m. This shows that kinetic energy decreases exponentially with time.

We know from Stoke’s law that damping force is proportional to velocity of a body. It also depends on the surface area in contact with the source of particles causing damping, like air.

There are two types of photoreceptor cells, namely, rods and cones. These cells contain the light-sensitive proteins called the photopigments. Daylight vision is the function of cones and twilight vision is the function of rods.

The inner layer of the eye is retina and it contains three layers of neural cells which are:
i. Ganglion cells
ii. Bipolar cells
iii. Photoreceptor cells.

The diameter of the pupil is regulated by the muscle fibres of the iris. The eyeball contains a transparent crystalline lens which is held in place by the ligaments attached to the ciliary body.

The choroid layer is thin over the posterior two-thirds of the eyeball, but it becomes thick in the anterior part to form the ciliary body. The ciliary body itself continues forward to form a pigmented and opaque structure called the iris.