In what type of reproduction do cartilaginous fish lay eggs?
Oviparous
Ovoviviparous
Viviparous
No answer text provided.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.