PART - 1 - Unit I : CH - 4 Animal Kingdom — BIOLOGY STD 11 Science — Question

Inflammatory responses can be controlled by a certain steroid. Name the steroid, its source and also its other important functions.

Photosynthesis not only facilitates production of food but also cleans up the environment. Which of the following is similar to this multipronged effect of photosynthesis? Explain how deforestation affects our environment.

1. An automobile not only carries people but also releases carbon dioxide in the air.
2. A cow not only gives milk but also produces methane which is a greenhouse gas.
3. A cow not only gives milk but also produces cowdung which can be used as kitchen fuel.

Vicky's mother was very concerned about his son. She always used to give him advices on how he should study, what is good for his health, and about everything. One day Vicky saw some, birds flying independently and asked his mother that why don't animals take care of their young ones like humans. Her mother smiled and explained that parental care is also well-developed in some animals.

1. Explain parental care in mammals.
2. Which other animals show parental care and how?
3. What does parental care indicate? bine
4. What values are shown by Vickey's mother?

Which features make mammals as the most successful and dominant animals?

Can you identify the correct sequence of taxonomical categories?

1. Species → Order → Phylum → Kingdom
2. Genus → Species → Order → Kingdom
3. Species → Genus → Order → Phylum

Enzymes are proteins. Proteins are long chains of aminoacids linked to each other by peptide bonds. Aminoacids have many functional groups in their structure. These functional groups are, many of them at least, ionisable. As they are weak acids and bases in chemical nature, this ionization is influenced by pH of the solution. For many enzymes, activity is influenced by surrounding pH. This is depicted in the curve below, explain briefly.

How the arrangement of vascular bundles in monocots differs from dicots?

Distinguish between Red, Brown and Green Algae.

In which organisms these structures are found and what is their role?

1. Paramylon.
2. Pseudoplasmodia.
3. Heterocysts.

Cyclic photophosphorylation results in the production of ATPs and not NADPH. Give reasons.