Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Give a brief description of ribosomes.

Fluke infections are diseases of the _______ in humans.

1. Blood.
2. Bile.
3. Digestive tract.
4. Lungs.

Differentiate between oxy haemoglobin and carbaminohaemoglobin.

Lalit, student of class XI always likes to have junk food. His mother insists him to have fibre rich fruits and vegetables, because they are good for health. Lalit always ignored his mother's advise. One day, while his biology teacher was teaching about the digestive system and mechanism of digestion. She also explained about the food one should eat (Le., balanced diet) Lalit remembered his mother's advice and asked his teacher about the importance of fibre rich food in one's diet.

1. According to you, what is the advantage of having fibrous material in our food?
2. Name the term used to describe fibrous materials which is indigestible in nature.
3. Name any four fibre rich fruits.
4. What values are reflected through Lalit's character?

Differentiate between. Emphysema and occupational respiratory disorder.

You are given two different flowers in laboratory. How will you identify which one is a monocot flower and which one is a dicot flower?

Which plant hormone can transform genetically dwarf plants into tall plants? State the mechanism involved with suitable example.

Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils.

1. Cucumber.
2. Pea.
3. Pumpkin.
4. Grapevine.

Osteichthyes belongs to:

1. Class amphibia.
2. Super class pisces.
3. Super class tetrapoda.
4. Division agnatha.