Biology, 14.03.2020 02:39, kayranicole1
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The four-chambered hearts of birds and mammals are best described as .
Answers: 2
Biology, 22.06.2019 01:00, nahimo
In which terrestrial biome can you find trees that produce cones instead of flowers and needles instead of leaves? have trees that produce cones instead of flowers and needles instead of leaves. the latitudes in this biome have evenly distributed precipitation throughout the year. is it high or low
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The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly po...
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