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stepan [7]
3 years ago
8

Vitamins are essential to any diet because what

Biology
1 answer:
NeTakaya3 years ago
5 0
According to which vitamin you are referring to i.e.
Vitamin C (ascorbic acid) prevent scurvy
Vitamin D helps absorb calcium which means that it prevents oestomalicia for adults and rickets
And so on
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Which of the following pairs of protists and their ecological roles are correctly matched?
melisa1 [442]

Answer:

The correct pair is A: "apicomplexans—parasites of animals"

Explanation:

  • Euglenophyta is a group of unicellular, eukaryotic organisms. They are small, free-living forms, or parasites that present different feeding mechanisms and behaviors, such as heterotrophy, autotrophy, or mixotrophy.
  • Dinoflagellates are unicellular, flagellated, free-living protists that might form colonies. Most of them are autotrophic organisms but some of them are heterotrophic, or mixotrophic. In these last cases, dinoflagellates can feed on other dinoflagellates, protozoans, or diatoms. They can also be parasites.
  • Entamoebas are endoparasitic organisms with no mitochondria as an adaptation of living in environments with low oxygen concentration.
  • Apicomplexa is a unicellular, protist group. They have medical and economic importance as they are<u> animals</u> and human parasites. They have an apical complex that helps them to fixate to the host cell and release a substance that provokes an invagination in the host membrane. This invagination allows the parasite to get into the host cell.
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3 years ago
What are the steps of the Calvin cycle in the correct order
pickupchik [31]
Carbon fixation, reduction phase, carbohydrate formation, and regeneration phase.
7 0
3 years ago
A molecule of water (H2O) has which bonds?
Dima020 [189]

Answer: 2 covalent bonds

Explanation:

In H2O molecule, two water molecules are bonded by a Hydrogen bond but the bond between two H - O bonds within a water molecule are covalent. The dotted lines represent a hydrogen bond and the solid lines represent a covalent bond.

4 0
2 years ago
Small, prolific mussels called zebra mussels were first introduced into the Great Lakes by a foreign cargo ship. They became a s
Dvinal [7]

Answer: Yes, because Congress may adopt laws regulating navigable waters.

Explanation:

It should be noted that municipalities using copper-based paint on their intake pipes can successfully be prosecuted for violating the federal law because Congress may adopt laws regulating navigable waters.

Under the Supremacy Clause, when the action of either the state government or the local government conflicts with the federal laws which are deemed valid, then such cities can be prosecuted.

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2 years ago
Which is the best description of the skin senses?
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Touch,pressure,temperature, and pain.
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