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4vir4ik [10]
3 years ago
13

According to cell theory, all cells carry out the functions needed to sustain life. That means all cells must contain A) DNA. B)

a nucleus. C) organelles. D) a control center.
Biology
2 answers:
Feliz [49]3 years ago
7 0
<span>Organelles are needed for all cells to sustain life. Cell theory states: -that all living things are made of cells -all cells camef rom preexisting cells -and all cells are the basic structure of life. The function or organelles is that it carries the little organs which are needed for specific functions in the body.</span>
SIZIF [17.4K]3 years ago
6 0

Answer:

Answer is   DNA

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Answer:

Cells vary greatly in shape These shapes are often related to the function they perform. like the disk shape of  erythrocytes  can absorb and transport oxygen due to increased surface area., the amoeboid shape of leukocytes allow them to squeeze through capillaries. etc.

Explanation:

Cells can be disc-like , polygonal, rectangular, cubopid thread like branched or even irregular. these are related to the functions that each cell performs.

Some examples showing relation between cell shape and function are as follows.:

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Mitochondria are found in _____. hints mitochondria are found in _____. animal cells and prokaryotic cells, but not plant cells
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2 years ago
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Read 2 more answers
What are the three classes of bryophytes?
Margaret [11]

Answer:

Class I: Hepaticopsida ( Liverworts)

Class II: Anthocerotopsida ( Hornworts)

Class III: Bryopsida ( Mosses)

Explanation:

Bryophytes are small plants that grows in moist and shady places.They don't attain great heights because of absence of roots, vascular tissues, mechanical tissues and cuticle. They are terrestrial but require external water to complete their life cycle. Hence they are called as the" amphibians" of the animal kingdom.

Class I: Hepaticopsida or Hepaticae

  • Gametophytic plant body is either thalloid or foliose. If foliose the lateral appendages are  without midrib.
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  • Each cell in the thallus contain many chloroplasts
  • Sex organs are embedded in the dorsal surface
  • Capsule lacks columella
  • Sporophyte may be simple having only one capsule or differentiated into root, seta and capsule
  • It has 4 orders: Calobryales, Jungermanniales, Spherocarpales and Marchantiales

Class 2: Anthocerotae or Anthocerotopsids:

  • Gametophytic plant body is simple, thalloid;thallus dorsiventra without air chambers shows no internal differentiation of tissues
  • Scales are absent in the thallus
  • Each cell of the thallus possess a single large chloroplast with a pyrenoid
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Class 3: Musci or Bryopsida

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Bryophytes are used as a packaging material for fragile goods, glasswares etc.Mosses are good source of animal food in rocky and snow clad areas. Decoction prepared by boiling Sphagnum in water  is used for the treatment of eye disease.

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3 years ago
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