CBSE Questions for Class 6 Biology Living Organisms Characteristics And Habitats Quiz 4 - MCQExams.com

1. Desert habitat
2. Mountain habitat
3. Polar habitat
4. Forest and Grasslands

• A streamlined body, flipper-like wings, and webbed feet help penguins in swimming.
• A streamlined body reduces the friction of movement during swimming, making the entire process smooth.
  
• Flippers allow aquatic and semi-aquatic animals to swim long distances while using less energy.
  
• When they're chasing food or trying to escape from predators, webbed feet help them move quickly through the water
  

• The polar habitat is covered with snow throughout the year. Only polar bears, penguins, reindeer, and some scatty plants survive in these types of conditions. 
• Pigeons and bats belong to aerial habitat.
• Fish belongs to the aquatic habitat.

$$\textbf{Correct Option D}$$

$$\textbf{Solution}$$

$$\bullet$$ $$\textbf{Option A}$$  Human beings are capable of moving their limbs, jaws, eyelids as well as lips. These moments are categorized as voluntary movements. This option is correct.

$$\bullet$$ $$\textbf{Option B}$$ The streaming of Protoplasm in a unicellular organism such as amoeba simple form of movement of the fluid. It increases the rate of transport of molecules an organelles to the cytoplasm. This option is correct.

$$\bullet$$ $$\textbf{Option C}$$  Locomotion is not a significant feature of living being because there are many living organisms which cannot move or locomote themselves such as plants, sponges etc. This option is not correct.

$$\bullet$$ $$\textbf{Option D}$$ The movement of the cilia and flagella as shown by many organisms. The organisms can range from algae to protozoa. Even some animals present in the animal kingdom also show movement of cilia and flagella. This option is correct.

$$\bullet$$ So, the correct option is D.