Answer: The answer is D; The speed of neural transmission is measurable
Explanation:
Helmholtz constructed an apparatus specially to measure short time intervals of the order of ten-thousandths of a second, Helmholtz was able, in an elegant experiment published in 1850, to measure precisely the speed of conduction of the nerve signals in the motor nerve of the frog's leg.
Answer:
The phase which occurs after G2 of the cell life cycle is the M phase, also known as Mitotic or Meiotic phase.
Answer:
In this lab, a visual representation of the process of DNA<em> profiling </em>was created by the process of <em>gel electrophoresis. </em>This process begins by using a restriction enzyme to <em>cut</em> the DNA into smaller fragments. The DNA fragments are placed in the holes of gel called <em>wells</em>. The gel is placed near the <em>negative electrode</em>. The DNA fragments travel toward the<em> positive</em> electrode because the DNA fragments are attracted to that side. The <em>small </em>molecules moved quickly through the gel and the<em> large</em> molecules moved slowly, creating a pattern of <em>bands</em> that can by analyzed.
Explanation:
DNA profiling can be described as a forensic technique which is using for comparing the DNA of different suspects with the DNA found at the crime site.
Gel electrophoresis can be described as a process through which different samples of DNA are separated based on their size and charge to mass ratio. The fragments of the DNA run on an agarose gel where they run from the negative terminal to the positive terminal depending on their size. The smaller molecules having a smaller mass will move faster than the larger molecules.
Answer:
3. Homo sapiens is the only surviving member of a highly branched evolutionary tree of hominin species.
Explanation:
This is regarded as the group consisting of modern humans, extinct human species and all our immediate ancestors (including members of the genera Homo, Australopithecus, Paranthropus and Ardipithecus).
It should be understood that the genus Ardipithecus, which lived in East Africa from about 5.8 to 4.4 million years ago, is the most likely ancestor of the hominins. It had taken the first step on the road to bipedalism, while retaining many ape-like traits. But, the earliest known true hominins belonged to the genus Australopithecus.
In this case, there are 4 evolutionary trends or changes that occurred during hominin evolution, these include
* bipedalism- being able to walk upright on two feet.
* dental changes- face is getting smaller, jaw is changing shape, so teeth change because of changing diets.
* cranial capacity- expanding area in hominin cranium.
* material culture- complexity of human made objects increasing over time.
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