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a_sh-v [17]
3 years ago
14

celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution b

ecome limp and soft. From this we can deduce that the cells of the celery stalk are
Biology
1 answer:
maxonik [38]3 years ago
3 0

Celery stalks that are immersed in fresh water for several hours become stiff and hard. :333333

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I Organisms can be dassified based on homology, which is shared characteristics inherited from a common ancestor. In the past, h
olga55 [171]

Answer:

DNA Bases

Explanation:

  • It can't be cellular organelles, division of the nuclear chromosomes, and types of proteins needed for cellular functions, so the answer is DNA bases.
5 0
3 years ago
A disease was caused by a bacterium; you want to produce a biological product to kill this bacterium. Which product you have to
makvit [3.9K]

Answer:

The product that must be produced to kill a bacterium —which causes a disease— is an antibiotic, which through biotechnology can investigate the structure of the bacterium and synthesize the chemical formula needed to produce antibiotics in high amounts.

Explanation:

Antibiotics are specific medicines for the treatment of infectious diseases, produced by bacteria. <u>Antibiotics can kill bacteria and prevent their replication</u>.

If a disease is produced by bacteria, the product that is necessary to kill those microbes is an antibiotic, for which biotechnology is useful.

By using biotechnology —a branch of biology that uses technology as a research and development tool— it is possible:

  • <em>Know the structure, functions and behavior of pathogenic bacterial strains. </em>
  • <em>Create chemical formulas -antibiotics- that serve to effectively eliminate bacteria, and cure infectious diseases. </em>
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4 0
3 years ago
Describes a change of the sequence of a dna molecule
zvonat [6]

Answer:

mutation

Explanation:

occurs when a DNA gene is damaged or changed in such a way a to alter the genetic message carried by that gene. A mutation is an gent of substance that can bring about permanent alteration to the physical composition of a DNA gene such that the genetic message is changed

7 0
2 years ago
What would be the independent, dependent, and control variable to how coral dies? (100 points)
lozanna [386]

Answer:

in the explanation

Explanation:

The independent variable would be us humans polutling the ocean with oil and other plastics destroying the coral reefs. The dependant variable is an abbrasive species of fish becoming overpopulated and killing all the fish that help the coral grow causing the coral to die. (independant variable basically means humans tampering with it causing the problem. dependent is naturally occuring humans cant control whether a fish overpopluates or not thats natural)

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3 years ago
Defend the statement found in controversy that foods, not supplements are the best and safest form of phytochemicals.
Anika [276]

Answer:

The easiest argument is the next one:

Suppose phytochemicals are like money. If I put you in a phone cabin with a lot of money and give you 30 sec to be there collecting as much money as you can, at the end you will collect not all the money and a lot of money will be lost. The same happens whit phytochemicals in supplements there are so many that your body can't use them all.

And other thing is that phytochemicals in supplements comes so concentrated that your body will be overstimulated to take this phytochemicals and that changes your normal digestion, in the time it may looks good...but if you don't take supplements anymore, your body will feel the lost and the physical results would be awull.

8 0
3 years ago
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