Which of the following animals undergo aestivation ?

Options

A. zooplankton and phytoplankton
B. Snails and fish
C. bears and seals
D. Snails and Octopus

Answer

To determine which animals undergo aestivation, we need to understand what aestivation is and analyze the options provided.

**Step 1: Define Aestivation**
Aestivation is a state of metabolic depression that occurs in some animals during hot and dry conditions. It allows them to survive periods of extreme heat and drought by entering a state of dormancy.

**Hint:** Aestivation is similar to hibernation but occurs in response to heat and dryness.

**Step 2: Analyze the Options**
- **Option A: Zooplankton and Phytoplankton**
- These organisms do not undergo aestivation; instead, they can enter a state called diapause, which is a form of suspended development.

**Hint:** Diapause is different from aestivation; think about the environmental conditions each term describes.

- **Option B: Snails and Fish**
- Snails are known to undergo aestivation to cope with dry conditions. Some fish also have the ability to enter a state of dormancy during extreme conditions, making this option plausible.

**Hint:** Consider which of these animals are known to survive dry conditions by slowing their metabolism.

- **Option C: Bears and Seals**
- Bears and seals undergo hibernation, which is a metabolic depression that occurs in response to cold, not heat. Therefore, this option does not include any animals that undergo aestivation.

**Hint:** Hibernation is specifically related to cold climates.

- **Option D: Snail and Octopus**
- While snails can undergo aestivation, octopuses do not. Therefore, this option is not entirely correct.

**Hint:** Check if both animals in the pair are known for aestivation.

**Step 3: Conclusion**
After analyzing the options, the correct answer is **Option B: Snails and Fish**, as both are known to undergo aestivation.

**Final Answer:** Option B: Snails and Fish