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AfilCa [17]
4 years ago
8

Horestails feel gritty because their stems contain

Biology
1 answer:
Novay_Z [31]4 years ago
7 0

Horsetails feel gritty because their stems contain silica

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How does waste removal in a fetus differ from waste removal after birth?
Eddi Din [679]

Answer: A) Fetal waste is removed through the chorion; infant waste is removed through the rectum.

Explanation:

A developing fetus is surrounded by chorion which is an outer membrane. The role of the chorion is to protect the embryo and provide nutrition to it in the form of blood supply. It helps in getting rid of waste products from the developing fetus that goes into the mother blood to remove out of her body. In case of infants the rectum is the last part of the digestive tract and it receives the waste in the form of fecal matter from small intestine which is removed out through the rectum.

6 0
3 years ago
In science class, Maria observes a white-colored cut flower. She sees that the petals turn red when the flower is sitting in a v
Marianna [84]

A hypothesis refers to a suggested illustration for a phenomenon. For a hypothesis to be a scientific hypothesis, there is a need to test it. Upon analysis, a hypothesis can be modified or rejected, but it can never be proved 100 percent accurate.  

A hypothesis needs more work by the individual testing it in order to either disprove or confirm it. A working hypothesis refers to a hypothesis, which is tentatively accepted as a foundation for a further research.  


3 0
3 years ago
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You are observing an enzyme driven reaction. You add chemical X, which inhibits the reaction. If you add more substrate, the rea
maks197457 [2]

Answer:

X is a competitive inhibitor.

Explanation:

X is a competitive inhibitor because it fights with the substrate for the active site of the enzyme. The active site is specific for a type of substrate, but as the inhibitor has a similar structure to the substrate, it can fit and not allow the substrate to interact with the enzyme and make its reaction. What we can do to do to keep having enzyme-substrate bindings is add more substrate to the solution, so there are more substrates than inhibitors, which leads to more products as a final result of the interaction between the enzyme and the substrate.

4 0
3 years ago
A scientist uses materials in her lab to cut a DNA sample into fragments. What process is this called?
Studentka2010 [4]

The right answer is The digestion of DNA by restriction enzymes.

The fragmentation of the DNA is done by bacterial enzymes called restriction enzymes.

Restriction-enzymes (or endonucleases) recognize and cut the DNA into a specific sequence. These enzymes are naturally produced in bacteria as a defense against bacteriophages - viruses that infect bacteria. The bacterial restriction enzymes cut the DNA of the invasive bacteriophage while leaving the bacterial genomic DNA healthy and safe through the addition of methyl groups.

These enzymes are used in practice at the laboratory level to explore DNA.

7 0
3 years ago
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Fertilization occurs when two cells called ______ fuse or come together to make one cell.
alex41 [277]

Answer: pretty sure its haploid cells

Explanation:

7 0
4 years ago
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