Answer:
Cambrian explosion
Explanation:
Cambrian explosion is a geological event that happened during the Cambrian age (541 million years ago). In this period, most of the animal phyla (including marine) appeared and their geological record is preserved in the form of fossils. The period lasted for 13-25 million years. Before this period, the organisms were very simple. They were mostly unicellular in nature and were living in the form of colonies.
The remaining three options are incorrect. They are tectonic events that reflect movement of continents in different geological times. None of them resulted in the diversification of (marine) animal phyla.
Answer:
Option (C)
Explanation:
Blood smears usually refers to the blood test that is being conducted in order to determine if there is any abnormality or irregularity in the blood cells. This test is conducted in the laboratories by using the slides.
After the test is done, these slides of blood smears are usually disposed of according to the instruction given by the teachers. It is because these slides have sharp edges and must be carefully handled. It can cause cut in the fingers and as these slides are comprised of infectious substances, it can affect other individuals, causing various types of diseases.
Thus, they must not be disposed of here and there, rather they should be disposed of according to the teacher's instruction.
Hence, the correct answer is option (C).
Answer:
<em>The water will diffuse into the air.</em>
Explanation:
Diffusion can be described as a process through which molecules travel from an area of higher concentration to an area of lower concentration along the concentration gradient. Such processes do not require energy. As the concentration of water is less in the air surrounding the cell as compared to the inside of the cell hence, the water molecules will move out of the vacuole and into the air by the process of diffusion.
When part of the catch is discarded and not used is called a "bycatch". This occurs when other, usually smaller fish, get caught by accident by fishermen hoping to catch other kinds of fish.
<span>Some of the factors that lead to contracting HBV are not preventable by choice. It is a virus that is spread by sexual activity, sharing needles, from mother to child, and from improper needle handling by medical professionals. The latter two (contracting at birth or from malpractice) don't allow any choice for the person who receives the virus, and there is nothing you could do to prevent it from happening.</span>
