BIOLOGY HIGH SCHOOL

The vocal cords are two bands of tissue that extend across the opening of the: larynx glottis trachea epiglottis

Answers

Answer 1
Answer: Larynx is the correct answer

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What term means removing the nucleus from a cell?

Answers

Answer:

enucleation

Explanation:

i got it right
lyse: to expel the nuclei from the cell

What kind of material help to cleanse ground water through the exchange of compounds and elements?

Answers

The correct answer is clay. Clay is the kind of material help to cleanse groundwater through the exchange of compounds and elements. Clay is the grained natural rock that is a combination of clay materials including organic matter.

How does natural selection affect undesirable traits?

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Natural selection affects undesirable traits, because as time pass on, the undesirable traits will be lost due to the competition with the desirable traits. For an example, the Rabbits that runs slower than normal rabbits, will eventually die due to the natural selection because the normal ones will run faster than the undesirable one. 

Which enzymes are secreted only by the pancreas?nucleases
amylase and proteases
lipases
amylase, proteases, lipases, nucleases

Answers

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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A plant breeder found a species of flowering plant with very attractive flowers growing wild in a field and she thought it would appeal to her customers. Some of the plants of this species had red flowers, some white flowers, and some pink flowers. While she would like to be able to offer her customers all three colors of flowers, she only has permission from the landowner to dig up one plant to bring back to the nursery as breeding stock. What would be the best thing for her to do?A. Take a white flowering plants is the white allele could be masking the pink allele
B. Tickle pink flowering plant since it is likely to carry both the red and white Alleles
C. Take a red flowering plants if they could produce all three colors eventually
D. Take a red flowering plants is the red Allele Is likely the dominant one

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i'd say B is correct (semidominance phenomenon)

Ryan is looking at a cell under the microscope. He observes formation of spindle microtubules from the centrosomes. Which phase of the cell cycle is he observing?

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Ryan is observing Prophase.
he is observing the nucleous of the cell in prophase
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