Answer:
when placed in hyper tonic solution , the cytoplasmic volume of elodea plant will be reduced, this is because, elodea is a water plant with high water potential; therefore,with cytoplasm of high water potential elodea will loose water from the cytoplasm to the external; hypertonic solution, of lower of potential by osmosis. This reduces the cytoplasmic volume.With time the protoplasm pulls away from the cell wall, and the whole elodea structure shrinks.
However,, when RBC is placed in hypotonic solution, of higher water potential than the RBC (which has lower water potential), the cytoplasmic volume increases as water moves into the cytoplasm by osmosis. The RBC swells and eventually busted. This is hemolysis.
Explanation:
Answer:
pH meter and pH paper.
Explanation:
There are a few other ways that are commonly used, including titration, but most are tedious and require detailed hands-on work. A pH meter is normally assisted by the use of a computer or a digital user interface. The use of pH paper can be likened to the use of a Galileo thermometer.
Answer:
B. absolute dating
Explanation:
Absolute dating is the process of determining an age on a specified chronology in archaeology and geology.
Absolute dating provides a numerical age or range in contrast with relative dating which places events in order without any measure of the age between events such as fossils by scientists.
Answer:
Yes
Explanation:
Certain elements such as oxygen are needed to carry out basic life processes on earth
Answer:
Archaic Homo sapiens
Explanation:
The evolution of modern species is studied through the fossils found in various parts of the world.
The <em>Homo erectus </em>is the first hominin species which possessed human-like characteristics like bipedalism and they appeared about 2 mya. The first evidence of <em>Homo sapiens</em> fossil belonged to about 1,60000 years ago.
In between them, scientists found some fossils which possess characteristics of both Homo erectus and Homo sapiens, therefore, these fossils were called archaic Homo sapiens. These fossils dated about 300000 years ago.
Thus, Archaic Homo sapiens is correct.