The diagram shows a sponge. What is the function of the structures labeled X?

providing protection from predators
fertilizing eggs
filtering and digesting food
stinging prey

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Which blood cell spend most of their time in the lymphatic system?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.

Does solar energy ever run out? brainliest