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Class - Mammalia Video Lecture | Biology for Grade 11
FAQs on Class - Mammalia Video Lecture - Biology for Grade 11
| 1. What are the characteristics of mammals? |  |
Ans. Mammals are warm-blooded animals characterized by having mammary glands that produce milk for their young. They also have hair or fur, a four-chambered heart, and a specialized jaw joint for chewing. Mammals give birth to live young and have a diaphragm for breathing.
| 2. How many species of mammals are there? | |
Ans. There are approximately 5,500 known species of mammals in the world. These include familiar animals like dogs, cats, elephants, and whales, as well as many lesser-known species such as bats, shrews, and anteaters.
| 3. What is the largest mammal on Earth? | |
Ans. The blue whale is the largest mammal on Earth and also the largest animal ever known to have existed. It can reach lengths of up to 100 feet and weigh up to 200 tons. Despite its massive size, the blue whale feeds on tiny shrimp-like animals called krill.
| 4. How do mammals reproduce? | |
Ans. Most mammals reproduce sexually, with males and females coming together to mate. The female then carries the developing embryo inside her body until it is ready to be born. Mammals have internal fertilization, where the sperm fertilizes the egg inside the female's body.
| 5. How do mammals adapt to their environments? | |
Ans. Mammals have evolved a wide range of adaptations to survive in different environments. For example, polar bears have thick fur and a layer of blubber to keep warm in cold Arctic climates, while camels have humps to store fat for water and energy in arid desert environments. Some mammals, like dolphins, have adapted to live in the water and have streamlined bodies and flippers for swimming.
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