Biology, 12.10.2019 02:10 alyssaxsanchez
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. the labeled branch points on the tree (v-z) represent various common ancestors. let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species. in darwin's tree of life, each fork in the tree represents
a. morphologic gaps in the fossil record
b. groups of living organisms
c. groups of extinct organisms
d. the most recent common ancestor of the subsequent branches
Answers: 2
Biology, 21.06.2019 20:40, jaycie16
Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling
Answers: 3
Biology, 21.06.2019 21:00, alanrojas0142007
This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment
Answers: 1
Biology, 21.06.2019 22:30, maddison788
Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into
Answers: 1
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ag...
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