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ElenaW [278]
3 years ago
6

in a tropical rain forest,the layer formed by the leafy tops is called the ____ and the layer of shorter trees and vines are cal

led____
Biology
1 answer:
frozen [14]3 years ago
7 0
It's called the emergents, and under canopy. Some may say the top is the canopy, but the trees growing past that is the emergents.
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18. Refer to Models 1 and 2 to complete the chart below. Write yes or no in the box for cach cell.
Ostrovityanka [42]

The most primitive cells are prokaryotic. They are simple, with no organelles and no nucleus. Animal and plant cells are eukaryotic, but they express some differences such as the cell wall, chloroplasts, or centrioles.

---------------------------------------------

<u>BACTERIA CELLS</u>

  • Bacteria are prokaryotic cells.

  • Prokaryotic cells lack a nucleus, nucleolus, and organelles.

  • They only present plasmids, ribosomes, and genetic material in their cytoplasm.

  • DNA not surrounded by membrane

  • They have a cell wall that protects the cell and a cell membrane that surrounds the cytoplasm. Some of them can also present a capsule.

  • Some of them have flagellum.

  • These organisms are capable of inhabiting places with e<em>xtreme temperature, salinity, acidity, or pH, among others. </em>

<u>ANIMAL </u><u>AND </u><u>PLANT CELLS</u>

  • Both the animal and plant cells are eukaryotic.

  • They carry their genetic material in the nucleus and mitochondria.

  • Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.  

However, they have some differences:

⇒Cell wall : <em>A </em><em>rigid structure</em><em> that provides </em><em>support </em><em>and </em><em>protection</em><em>.</em>

• Animal cells do not have a cell wall. They are only surrounded by the cell membrane, which is flexible so they can adopt different shapes.

• Plant cells have a wall, so their shape is usually prismatic and regular. The cell wall is composed mainly of cellulose.

⇒ Chloroplast: these are organelles that accumulate chlorophyll.

• Animal cells do not have chloroplasts because they do not photosynthesize.

• Plant cells have chloroplasts, and they are in charge of the photosynthesis process that allows plants to release oxygen. These organelles use solar light as the source of energy.

⇒ Vacuoles:  

• Animal cells have many and small vacuoles whose function is to store water, ions, and waste intracellular substances.  

• Plant cells have a unique big-sized vacuole that might occupy almost 90% of the cell. Their principal function is to store water and keep the turgidity. When the vacuole gets empty, the plant loses rigidity.

⇒ Other differences are:

  • The animal cell has centrioles, while the vegetable cell does not.  
  • Plasmodium, chromoplasts, and glyoxysomes are present in the vegetable cell but not in the animal cell.

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3 0
2 years ago
The two purines in DNA are blank and blank
musickatia [10]
<span>The two purines in DNA are adenine and guanine.</span>
8 0
3 years ago
Which isotope is best for dating metamorphic rocks? carbon-14 potassium-40 radon-222 uranium-235
solong [7]
I think the correct answer is the second option. The best isotope to be used in dating metamorphic rocks would be potassium-40. It is the most common and is widely appliclable since most of metamorphic rocks have potassium in it. The isotope system used is potassium-argon.
3 0
3 years ago
HURRRRRYYYY ITS DUEEEEEEEEEE
Vedmedyk [2.9K]

Answer:

A) The Moon passes into the Earth's shadow.

Explanation:

4 0
3 years ago
Compare the two dna sequences shown below. transcribe them into mrna and translate them into an amino acid sequence. gtg cac ctc
Gnoma [55]
As you can see in the picture presented below, the DNA sequence in individuals with normal hemoglobin and in the individuals with sickle cell hemoglobin differ in only one nucleotide. However small, this difference in the nucleotide changes  the amino acid from glutamate to valine, changing the structure of the protein in the red blood cells.

8 0
3 years ago
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