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Alex Ar [27]
3 years ago
13

Free oxygen formed on earth after

Biology
1 answer:
harina [27]3 years ago
5 0

Answer: (1) photosynthesis occurred

Explanation: The photosynthesis process in cianobacteria changed the composition of earth's atmosphera, rising oxygen levels. This could be possible since photosynthesis used energy from the sun to produce energetic intermediaries to synthesize sugars, and as byproduct due to water photolisis, is oxygen.

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Red flowers (r) and white flower (w) are crossed to produce a pink flower (rw). what is the probability of a red flower, if 2 pi
Dafna11 [192]
I think the probability will be 0 then.
7 0
3 years ago
Match each interaction with its example.
Sati [7]

Answer:

1. Parasitism

2. Mutualism

3. Competition

4. Commensalism

Explanation:

The given are all different ecological relationships. These relationships how the members of the ecosystem interact with each other.

Parasitism is a relationship where one organism is harmed and the other one benefits. However, parasitism is specifically referring to a relationship where one lives inside the other organism, causing it harm by directly feeding off them or depriving it from getting nutrients.

Mutualism is a relationship were both organisms benefit from the relationship. In the example, the aphids provide protection for the ants while the ants provide food to the aphids (honey dew). Another example of a mutualistic relationship would be the tickbird and the rhino. The rhino benefits because the tickbird eats the ticks of the rhino, and in return, the tickbird is fed.

Competition is a relationship between organisms that compete for resources. In the case of your question the two grasses are competing against each other for the nutrients and water. Animals also share this type of relationship, especially when those that prey on the same animals for food.

Commensalism is a relationship between organisms where one benefits and the other does not benefit, but is NOT harmed. A good example would be the remora and sharks. Remoras are fish that swim with sharks. They swim beneath the sharks fins. The sharks provides them protection from other predators and remoras benefit because they get to eat scraps of the sharks food as well.  

4 0
3 years ago
What feature is common to all microscopes, and how is this feature related in the word microscope?
maw [93]
All microscopes have lenses. Some types of lenses are eyepiece lenses, objective lenses, and condenser lenses.
5 0
3 years ago
Read 2 more answers
Which description applies to alternative mRNA splicing?A-protein modifications such as addition of a functional group, or struct
ElenaW [278]

Answer:

The correct answer is E-processing of exons in mRNA that results in a single gene coding for multiple proteins.

Explanation

Splicing is the process where introns are cut out of the mRNA so only the coding parts for proteins. In this way, genes can code for many proteins, depending on how the amino-acids are arranged.

8 0
3 years ago
What is DNA replication? Highlight your answer.
morpeh [17]

Answer:

C

Explanation:

5 0
3 years ago
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