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Likurg_2 [28]
3 years ago
8

"What are the bacteria living in the ocean that do the nitrogen fixation, and were the first photosynthesizers on Earth providin

g the early oxygen found in the atmosphere around 2 billion years ago
Biology
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

Cyanobacteria

Explanation:

Cyanobacteria were the first photosynthetic autotrophs that used water molecules as the source of electrons. Cyanobacteria were the first autotrophs that performed oxygenic photosynthesis and carried out the splitting of water.  

The process of splitting water released oxygen as a gas (O2) which was released in the atmosphere of the earth as a by-product. This led to the accumulation of oxygen in the atmosphere. Some cyanobacteria can fix nitrogen and have specialized cells called heterocyst which serve as the site for nitrogen fixation.  

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Navah writes out the chemical equation for photosynthesis. She includes two reacting molecules to the left of the arrow and two
Nadya [2.5K]
A. light energy, above the arrow

<span>Photosynthesis is a process wherein light energy is converted into chemical energy. </span>
Components of photosynthesis:
Water
Carbon Dioxide
Light energy, mostly from sunlight, is the main requirement for photosynthesis to occur. 


6 0
3 years ago
In chickens, having feathers on legs is dominant to having featherless legs. In a population of 200 chickens, 128 have featherle
Neporo4naja [7]

Answer:

64

Explanation:

Since the population is in Hardy-Weinberg equilibrium and the equilibrium is defined by the equation

p² + 2pq + q²

where the frequency of the homozygous dominant allele F ( feathers on the leg ) = p²,

F of homozygous ( featherless legs) = q²

F of heterogyous ( carrier of featherless allele) = 2pq

F (q²) = 128/200 = 0.64

q = √0.64 = 0.8

and p + q = 1

p = 1 - 0.8 = 0.2

2pq = 2 × 0.2 × 0.8 = 0.32

number of chickens that are heterozgous for the feathered leg allele = 0.32 × 200 = 64

3 0
3 years ago
Which of the following is an example of a renewable resource?
Vika [28.1K]

A renewable resource is a resource that can be renewed/or replinished meaning the Sustainably Harvested seafood must be your answer. Natural gas takes too long to replenish so it is considered non-renewable. You can bring back sand once it's gone nor Methane Hydrates.


Sustainably harvested seafood


hope this helped

4 0
3 years ago
True or False? There is less than $2 of wine in a $9 bottle of wine.
BaLLatris [955]

depends on the bottle

but personaly i think its false


5 0
3 years ago
Read 2 more answers
Describe the word homeostasis, and why would homeostasis not be maintained if the cell membrane was damaged?
balu736 [363]
Homeostasis is the stable internal condition of a cell. It what keeps you healthy. Homeostasis happens in the cell membrane so it it were damage, you would have trouble maintaing homeostasis, which could lead to illness, then DEATH
7 0
3 years ago
Read 2 more answers
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