Snakes that are active in daytime generally have round pupils. What about snakes that come out at night? They have

To understand the characteristics of snake pupils, we need to consider their activity patterns. Snakes that are active in the daytime typically have round pupils. However, snakes that come out at night have unique adaptations for low-light conditions.

Now, let's go through each option and explain what is correct for snakes that come out at night:

A. horizontal pupils: This option is incorrect. Snakes that are active at night do not have horizontal pupils. Horizontal pupils are typically seen in animals such as goats and sheep.

B. no pupils: This option is incorrect. All snakes have pupils, regardless of their activity patterns.

C. vertical pupils: This option is correct. Snakes that come out at night typically have vertical pupils. Vertical pupils are common in nocturnal animals and help them adjust to varying light levels.

D. round pupils: This option is incorrect. Round pupils are typically seen in snakes that are active during the daytime.

So, the correct answer is:

C. vertical pupils