Which of the following is an ongoing trend in the evolution of land plants? (a) decrease in the size of the leaf (b) reduction of the gametophyte phase of the life cycle (c) elimination of sperm cells or sperm nuclei (d) increasing reliance on water to bring sperm and egg together (e) rhizoids.

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

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