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frosja888 [35]
3 years ago
6

The cohesion-tension theory proposes that the physical properties of water allow the rise of water through a plant. Sketch and d

escribe cohesion and adhesion of water molecules. Don't do the sketch part only do just the description part.

Biology
1 answer:
RoseWind [281]3 years ago
8 0

Answer:

Cohesion: the attraction force between the same type of molecules.

Adhesion: the attraction force between different types of molecules.

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When is a recessive allele expressed?
Andreas93 [3]

Answer:

when an organism is homozygous at the locus

Explanation:

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3 years ago
Name the earth’s five major environmental spheres and state the defining characteristics of each
Ilya [14]
Hi

1. Lithosphere
2. Hydrosphere
3.atmosphere
4. Biosphere

The lithosphere/geosphere is made of the earth's core, the mantle, crust, ocean floor,mountains, sand, etc.The hydrosphere is made of everything water such as oceans, rivers, lakes, rain, and snow.The atmosphere is made of gasses such as oxygen, and hydrogen.Finally the biosphere is all that has life such as plants, animals, people, insects, etc.
3 0
3 years ago
Starting from the sun, create a food chain including at least three organisms. Explain how energy is transferred through the cha
Kryger [21]

Answer:

The food chain showing seven organisms can be drawn as follows:

Plants → grasshoppers → mice → frog → snakes→ eagles → decomposers

The plants are the primary source of food in a food chain or a food web. The animals which feed on plants will be termed as herbivores or primary consumers like the grasshopper. The organisms feeding on primary consumers will be the secondary consumers like mice.

An energy pyramid for three of the organisms can be shown as follows:

              mice (10 kilocalories)

                   ↑

        Grasshoppers (100 kilocalories)

                   ↑

       Plants ( 1000 kilocalories)

As the energy pyramid shows, only about 10% of the energy travels from one trophic level to another.

Explanation:

6 0
2 years ago
Which step in the Gram stain is the critical step in differentiating Gram negative cells from Gram positive cells?
rewona [7]

Answer:

The rapid decolorization with ethanol or acetone

and counterstaining with safranin

When a decolorizer such as alcohol or acetone is added, it interacts with the lipids of the cell membrane. A gram-negative cell loses its outer lipopolysaccharide membrane, and the inner peptidoglycan layer is left exposed: when safranin is added they will turn red. Conversely, gram-positives retain the Cristal violet and will color in purple

5 0
3 years ago
G you extracted your dna from cheek cells. the concentration of your dna sample is 250 ng/μl. the dna template for pcr should be
Karo-lina-s [1.5K]
You should mix 4µl of DNA sample and complete it with 96µl (100-4) of water.

You can figure this out by using  C1.V1 = C2.V2
C1 = 250 <span>ng/μl (Sample Concentration)
</span>V1 = ?          (the necessary volume to take from the DNA sample)
C2 = 10 <span>ng/μl (PCR concentration)
</span>V2 = 100 µl (total volume)

V1 = \frac{C2 . V2}{C1} = \frac{10 . 100}{250} = 4µl

For the water: 100µl (total volume) = 4µl + Water
Water volume = 96µl
6 0
3 years ago
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