Daily NEET MCQ- April 10, 2022 - NEET MCQ

The root means square speed of particles is nothing but the square root over the sum of squares of the particle’s speeds by a total number of particles. So by substituting, √3² + 4² + 5²/3 = 4.082 m/s.

The anal cerci are present in the 10th abdominal segment in both male and female cockroaches. Cockroaches possess one pair of anal cerci. The anal cerci are jointed filamentous structures.

Both male and female cockroaches have tegmina or forewing, genital pouch and anal cerci. Anal style is present only in male cockroaches. They possess one pair of thin and thread-like anal cerci.

The anus is located dorsally on the body of the male cockroach. It is used for excretion. The male genital pore, the gonapophysis and the forelegs of the male cockroach is located on its ventral side.

The brood pouch or the genital pouch contains the spermathecal pores. The brood pouch also contains the female gonopore and the collateral glands. The 7th, 8th and 9th segments of the abdomen make up the brood pouch.

The 8th and 9th segments of the abdomen of the female cockroach are a part of the brood pouch or the genital pouch. The genital pouch is made of the 8th, 9th and boat – shaped 7th segments.

According to the formula, the root mean square speed is greater than the average speed and the average speed is greater than the most probable speed at given identical conditions and for the same gas.

The sternum or the breast bone is present in the thoracic region. It is a flat bone that is present in the midline of the thorax. The sternum is present ventrally in the body and helps in the attachment of ribs.

Humans possess 26 vertebrae in the vertebral column. These vertebrae are divided into five different regions, namely the cervical (7), thoracic (12), lumbar (5), sacral (1-fused) and coccygeal (1-fused) regions.

The distance between A and B is 13 units. The distance between B and C is 10 units. Hence, the total distance is 23 units. The total time taken is 20 s. Average speed = total distance/total time taken = 23/20 = 1.15 units/s.