All of the following statements are true. Decide which of the examples of molecular biology give evidence for evolution. Check a
ll of the boxes that apply. 1 HOX genes are very similar in all animals.
2 Bug wings and bat wings are both used for flying.
3 Many species share much the same DNA.
4 Plant and animal cells have almost all of the same structures.
4 Plant and animal cells have almost all of the same structures.
Explanation:
Evolution corresponds to the process of modification and adaptation of species over time. The current diversity and genetic similarity of living beings is the result of processes of transformation and adaptation of species to various environments, constituting biological evolution. As evidence of this evolution, we can mention:
HOX genes are very similar in all animals: Hox genes encode transcription factors that define cellular identities along the major and minor axes of the body. Its coordinated expression in space and time is fundamental for embryonic modeling. These genes control the development and positional differentiation of cells in the embryo, and their disposition along the chromosome collinear to the parts of the embryo they will regulate. They are present in many different animals representing a huge source of evolutionary change.
Many species share much the same DNA: All living things have DNA molecules that encode all genetic information. Among living things there are similarities and sharing of parts of DNA. This is strong evidence of species evolution. An example of this is the similarity between humans and chimpanzees.
Plant and animal cells have almost all of the same structures: Although there are some differences, plant and animal cells share almost all cell structures. This is a strong indication of how life has evolved on our planet.
The action potential spreads through an axon by depolarizing adjacent membrane to threshold.
K+ departs the cell after Na+, which enters the cell first. Ions can move freely across the axon membrane because of the difference during the action potential.
Because sodium contains a positive charge, the neuron becomes more positive and depolarized. Potassium channels take longer to open. As soon as the cell does open, K+ rushes out, reversing the depolarization known as repolarization.
Sodium channels close during the peak of the action potential when potassium leaves the cell. When potassium ions are effluxed, the membrane potential is lowered or the cell becomes hyperpolarized.
Outside of the cell, the concentration of Na+ is greater than inside the cell. while the concentration of K+ is is greater inside the cell than outside.
Perhaps the world's most famous early human ancestor, the 3.2-million-year-old ape "Lucy" was the first Australopithecus afarensis skeleton ever found, though her remains are only about 40 percent complete (photo of Lucy's bones). Discovered in 1974 by paleontologist Donald C.
