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Svet_ta [14]
3 years ago
10

Which stimulus causes the roots of seedling to grow downard ?

Biology
1 answer:
Sergeu [11.5K]3 years ago
7 0
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
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many organisms that undergo chemosynthesis use instead of to fuel the processes that convert carbon dioxide into sugars.
OLEGan [10]

Answer:

Many organisms that undergo chemosynthesis use hydrogen sulphide (H2S) instead of sunlight to fuel the processes that convert carbon dioxide into sugars.

Explanation:

Prokaryotic microorganisms, principally bacteria and archaea (referred to as “bacteria” in the following), carry out chemosynthetic reactions. Energy is produced in chemosynthetic reactions from oxidizing reduced compounds.

Chemosynthesis is the conversion of carbon (usually carbon dioxide or methane) into organic matter using inorganic molecules (hydrogen or hydrogen sulphide) or methane as an energy source. Most energy is initially derived from sunlight via plant photosynthesis. Example, bacteria and methanogenic archaea living in deep sea vents

Learn more about Chemosynthesis - brainly.com/question/14727352

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7 0
2 years ago
Gorter and grendel extracted lipids from human red blood cells. they calculated the total surface area for these red blood cells
Anastaziya [24]
<span>The calculated to surface area for red blood cells by Gorter and Grendel found to be 36u2.

 The surface area that would be covered once they spread across the surface of the water is 72u2.

If they spread across the surface area will double. This is because the lipid bilayer with phospholipid the head faces the water on each surface of the membrane.
 It clearly shows that there must be more to membranes than lipid bilayer because membranes grew and the surface tension of membranes is much lower than those of pure lipid structures.</span>
7 0
3 years ago
What type of bonds holds together the sugar phosphate backbone
Lilit [14]
The bond formed between the sugar of one nucleotide and the phosphate of an adjacent nucleotide is a covalent bond. A covalent bond is the sharing of electrons between atoms. A covalent bond is stronger than a hydrogen bond (hydrogen bonds hold pairs of nucleotides together on opposite strands in DNA).
7 0
3 years ago
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Oils and waxes are water repellent. give two examples in animals or plants where this property would be useful
MAXImum [283]
The water repellant properties of waxes is very useful in the leaves of some plants, in the feathers of birds and also in cuticle of insects. Waxes in plant leaves reduce the amount of water that is lost by the leaves. The wax that is present in the birds' feather prevent them from getting wet with water.
4 0
3 years ago
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In the Hershey-chase experiment, what happened to the bacteria that had been infected by viruses that had radioactive DNA, and t
cestrela7 [59]

Answer:

The bacteria infected with viruses that had radioactive DNA had become radioactive. The bacteria that had been infected with viruses marked with radioactive proteins were not radioactive.

Explanation:

The rest of the answers:

1.2

2.3

3.2

4.1

5.b

3 0
3 years ago
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