Questions: Question 17 (1 point) Dolphins are most closely related to Ichthyosaurs Sharks Cows Walruses Elephants Question 18 (1 point) Which animal is NOT an amniote? Crocodile Bird Salamander Lizard Beaver

Question 17:
The answer is: Cows.
Explanation: Dolphins are mammals and are most closely related to other mammals. Among the options provided, cows are mammals, while ichthyosaurs, sharks, and walruses are not. Elephants are also mammals, but dolphins and cows are both part of the clade Cetartiodactyla, which includes cetaceans (like dolphins) and even-toed ungulates (like cows).

Question 18:
The answer is: Salamander.
Explanation: Amniotes are animals that lay eggs on land or retain the fertilized egg within the mother, and they include reptiles, birds, and mammals. Crocodiles, birds, lizards, and beavers are all amniotes. Salamanders, however, are amphibians and do not lay amniotic eggs, making them the correct answer as the animal that is not an amniote.