mechanical weathering
chemical weathering
biological Weathering
The root of a huge tree causes cracks in a rocky surface.
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Part of a cliff breaks and falls due to waves.
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Acid rain reacts with calcite present in limestone,
Answer:
The root of a huge tree causes cracks in a rocky surface.---> biological Weathering.
Part of a cliff breaks and falls due to waves.----> mechanical weathering
Acid rain reacts with calcite present in limestone---> chemical weathering
Explanation:
The root of a huge tree causes cracks in a rocky surface is the example of biological Weathering because in this weathering living organism is involved. Part of a cliff breaks and falls due to waves of water is the example of mechanical weathering because water enters the small pores of rocks and formed cracks when expands. Acid rain reacts with calcite present in limestone is a chemical weathering because acid present in rain water is responsible for the degradation and breakdown of rocks.
Here's the matching of the scenarios with the types of weathering:
1. The root of a huge tree causes cracks in a rocky surface - Biological Weathering
2. Part of a cliff breaks and falls due to waves - Mechanical Weathering
3. Acid rain reacts with calcite present in limestone - Chemical Weathering
Biological Weathering: In this scenario, the root of a huge tree causes cracks in a rocky surface. Biological weathering refers to the breakdown of rocks caused by the activities of living organisms. The roots of the tree can exert pressure on the rocky surface as they grow, causing cracks and eventually breaking apart the rock.
Mechanical Weathering: Part of a cliff breaks and falls due to waves. Mechanical weathering involves the physical breakdown of rocks into smaller fragments without changing their chemical composition. In this case, the force of the waves pounding against the cliff causes pieces of the rock to break off and fall.
Chemical Weathering: Acid rain reacts with calcite present in limestone. Chemical weathering involves the breakdown of rocks through chemical reactions. Acid rain, which is rainwater with a low pH due to the presence of acidic compounds, reacts with the calcite (a mineral in limestone) and causes it to dissolve, leading to the erosion and weakening of the limestone.
Each type of weathering plays a role in shaping the Earth's surface over time, and they often work together to break down rocks and minerals into smaller particles.
To know more about Biological Weathering follow the link:
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translation
translocation
mRNA synthesis
B. Translation
Translation is the process whereby Messenger RNA is decoded in a ribosome and uses its information to build chain of amino acids or polypeptide. Furthermore, specific amino acids that are carried by tRNAs are chain together into a polypeptide as the mRNA passes through ribosome. However, there are three stages or phases in translation which includes: Initiation, Elongation and Termination.
Answer:
The correct answer would be translation.
Translation is the process by which nucleotide sequence of mRNA (messenger ribonuceic acid) is converted into the amino acid sequence of the polypeptide chain.
Ribosome serves as the site of translation in a cell.
The process of translation can be divided into three phases:
Initiation: The small and large sub-units of the ribosome sandwiched the mRNA around the start codon and provide the sites (A, P, and E site) for tRNA (transfer RNA)-mRNA interaction.
Elongation: The charged tRNA (tRNA carrying amino acid) enters at the A site. The anti-codon site present in tRNA helps in decoding the codon sequence present in mRNA.
The tRNA then adds specific amino acid to the growing polypeptide chain in P site. It then leaves from E site.
The ribosome then moves (translocates) to the next codon and the cycle repeats itself and add amino acid to the polypeptide chain.
Termination: As soon as ribosome reaches the stop codon it releases the polypeptide chain and dissociates from the mRNA.
The polypeptide chain then undergoes post-translation changes to mature into functional protein.
Nondisjunction is the failure of a pair of chromosomes to separate (to disjoin) during cell division (meiosis). When this happens ( in anaphase I of meiosis) two out of the four new daughter cells produced from a parent cell will have an extra copy of one chromosome and the other two daughter cells will end up missing that chromosome.
Most of the time when fertilization involves gametes with an abnormal number of chromosomes, the resulting cell does not survive to produce a new individual. However there are some cases where the individuals survive and such, when they are born end up having a syndrome caused by too many or too few chromosomes. An example is Turners syndrome caused by too few chromosomes (monosomy x) , and Down syndrome caused by too many chromosomes (trisomy 21).
Answer:
Nondisjunction is the failure of a pair of chromosomes to separate during meiosis.
Explanation:
Female cones produce pollen that fertilizes the egg.
Most coniferous trees have both male and female cones.
Male cones cannot produce pollen unless fertilized by the female cone.
Female cones produce pollen that is trapped by the male cones’ scales
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