Question

Answer in three-four sentences:
1 Calculate the temperature at which Celsius and Fahrenheit thermometers will show an equal reading.
2 What is the reason behind Kwashiorkor disease and what are its symptoms?
3 With the help of a labelled diagram show how light travels from a denser medium to a lighter one.
4 How ‘‘Jacobson’s Organ’’ helps the snake to become aware of its surrounding environment ?
5 How does the image formed in a pinhole camera change when the hole is enlarged ? Explain.
6 Explain how marine fishes maintain the water content of their body at the normal level.​

Answer 1

Answer:

1) −40 Celsius is equal to −40 Fahrenheit. (Proved below)

Celsius to Fahrenheit is (°C × 9/5) + 32 = °F

−40× 9/5 = -72

-72 + 32 = −40

2) Kwashiorkor is a severe form of malnutrition. It's most common in some developing regions where babies and children do not get enough protein or other essential nutrients in their diet. The main sign of kwashiorkor is too much fluid in the body's tissues, which causes swelling under the skin.

3) Answered in the attached document.

4)The snake sends out his forked tongue and some of the moisture-laden smell particles lands on the tips of the fork. Then, the snake flicks its tongue back inside where the tips of its forked tongue can be dipped into the ducts from the Jacobson organ.

5)The image on the screen will be blurred because a bigger hole is equivalent to a large number of pinholes. That leads to overlapping of images which result in a blurred image. The luminous object is moved towards the pinhole the size of the image is increases.

6) Marine fishes maintain the water content of their body at the normal level by Osmoregulation. Osmoregulation is the procedure by which the fish keep an internal ratio of salt and water in their body.