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Elden [556K]
3 years ago
7

How did life begin?

Biology
1 answer:
Feliz [49]3 years ago
6 0

Explanation:

Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of evolution that led to more advanced forms of life, including human beings.

The main causes of climate change are: Humanity's increased use of fossil fuels – such as coal, oil and gas to generate electricity, run cars and other forms of transport, and power manufacturing and industry. Deforestation

Volcanologists can predict eruptions—if they have a thorough understanding of a volcano's eruptive history, if they can install the proper instrumentation on a volcano well in advance of an eruption, and if they can continuously monitor and adequately interpret data coming from that equipment.

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Human abo blood groups are determined by a single gene with 3 alleles: a, b, and o. in a sample of 300 individuals, 100 are bloo
KengaRu [80]
Allele frequency is determined by looking at the dominant and recessive allele of a genotype. 
Using the given, we can come up with the following computation for the allele frequency:
allele A = 100/300 allele B = 50/300 allele O = 150/300
Hence, the frequency of allele A is 0.33 or 33%, allele B is .17 or 17% and allele O is 0.50 or 50%.  
5 0
3 years ago
How would a tsunami most likely affect the abundance of aquatic organisms in the intertidal zone of the ocean?
AlexFokin [52]

Answer: C). A tsunami would decrease abundance by causing physical damage to the organisms and their ecosystems.

An intertidal zone is also known as littoral zone. It is the region which is covers the foreshore and seabed. This region is exposed to the affects of tides. This region is highly vulnerable to tsunamis. The tsunami will disturb the habitat of organisms living in intertidal zone. Therefore, will result in decrease in abundance of aquatic organisms.

5 0
3 years ago
Read 2 more answers
14. Describe the difference between the three macroinvertebrate categories and
tankabanditka [31]

Answer:

Invertebrates are the organisms in which backbone or vertebral column is absent.

The three macroinvertebrate categories are annelids, mollusks and arthropods.

Annelids are the organisms having segmented body. They are found in moist places. Examples are leeches and earth worms.

Mollusks are the organisms which are enclosed in a calcium carbonate shell. Examples are snails and slugs.

arthropods are the invertebrates which have segmented body and jointed appendages. Examples are insects and crustaceans etc.

7 0
3 years ago
Which term describes organ systems that work together and maintain steady internal conditions when external conditions change?
Mashutka [201]

Answer:

I believe it is D.

Explanation:

Homeostasis refers to the relatively stable state inside the body of an animal. Animal organs and organ systems constantly adjust to internal and external changes in order to maintain this steady state

3 0
2 years ago
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In which process do plants release oxygen?
Eduardwww [97]

Photosynthesis is your answer :)))

7 0
2 years ago
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