Tissues Test - ...

Vascular layers of plant body have

Which one of the following helps in keeping the body warm?

One of the factors required for the maturation of erythrocytes is

Which of the following statements is incorrect?

A man was brought up at sea level while his brother spent all his life at an altitude of 10,000 feet. The latter will have

Number of RBC increases if one lives at higher altitude because   

One of the factors required for the maturation of erythrocytes is 

A bone left in dilute HCl for about three days will______________

An adult male is made up of ................ % of skeletal muscles.

Read the passage and answer the following question.
Students carry out an experiment to explore the effect of different environments on blood flow using small, freshwater fish. Each fish is placed into a petri dish. A wet cotton ball is placed over its gills to allow for the diffusion of oxygen, which will keep the fish alive. The students then place the petri dish onto the stage of a light microscope so that the thinnest part of the tail is directly under the objective lens and blood can be seen flowing in blood vessels. While focusing on a capillary, students count the number of red blood cells flowing through the vessel at 5-second intervals. After monitoring the normal flow of blood for 30 seconds, the environment in the petri dish is altered in one of five different ways. Students observe and record the change in blood flow if any. After the experiment, each fish is returned to the fish tank.