Scientists and engineers actively seek evidence to test their ideas — even if the test is difficult. The reason behind is the importance of asking questions based on observations to find more information about the natural effects and proposals. From there, it is ought to determine expected results based on testing, evidence resulting from that experiment will allow testers to find out the solution they are looking for.
A) Nothing, the genetic variation will stay the same.
B) The genetic variation will decrease.
C) The genetic variation will increase.
D) This type of gene transfer is impossible in eukaryotes.
Answer:
The correct answer would be C) The genetic variation will increase.
Horizontal or lateral gene transfer refers to the transmission of genetic material between two different genomes which is distinguished from a transfer of genetic material from parent to the offspring that is, vertical gene transfer.
For example, transformation, transduction, and conjugation result in horizontal gene transfer in bacteria.
It increases genetic variation of the population and plays important role in adaptation as well as evolution.
b. organ.
c. tissue.
d. cell. User: Which of the following is an example of epithelial tissue?
a. bone
b. skin
c. fat
d. muscle User: The excretory system consists of which of the following organs?
a. stomach, liver, pancreas
b. lungs, nose, trachea
c. kidneys, ureters, urinary bladder
d. brain, spinal cord, sense organs
Answer:
The correct answer will be -The background appears brighter than the specimen which appears darker.
Explanation:
The light microscope uses sunlight energy to view the specimens in the microscope.
The light microscope is of two types depending on the appearance of the background of the specimens: Bright-field and Dark field specimens. Since in bright-filed microscope, the specimens appear darker than the background which appears darker helps visualize the sample clearly.
Thus, The background appears brighter than the specimen which appears darker is the correct answer.
amylase and proteases
lipases
amylase, proteases, lipases, nucleases
Nucleases are the enzymes that are unique to the pancreas. These are enzymes which break down nucleic acids DNA and RNA into nucleotides. When these nucleotides reach the ileum, they are further degraded or digested into sugars, bases and phosphates. These nucleases are known as DNAase and RNAase
Other pancreatic enzymes such as amylase and protease are also produced by other digestive organs such as the salivary glands and the small intestine respectively. However no other digestive organ has been known to produce nucleases apart from the pancreas.
Nucleases are of two main types, namely exonucleases which cut off the end of a nucleotide and endonucleases which will cut out certain nucleotide sequences right in the middle of a nucleic acid.
The enzymes that are secreted only by the pancreas are amylase, proteases, lipases, and nucleases. Therefore, option (4) is correct.
Digestive organs include the pancreas. It secretes digestive enzymes into the small intestine to facilitate food digestion. Amylase breaks starches into sugar molecules. Trypsin and chymotrypsin break proteins into amino acids. Fatty acids and glycerol from lipases aid fat breakdown and absorption.
Finally, nucleases break down DNA and RNA into nucleotides. The pancreas exclusively produces and secretes these enzymes to aid small intestine digestion and absorption. Therefore, option (4) amylase, proteases, lipases, and nucleases is correct.
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