Boys shoulders broaden and voice deepen, Girls start having menstrual periods and develop breast. <span />
Answer:
the law of conservation of energy states that energy can not be created or destryed, it can only be transferred between forms. With regards to the total energy in a system, it remans constant as energy can not be created or destroyed.
Explanation:
Answer:
Virus.
Explanation:
Viruses can't reproduce without invading the cell of another living being.
Answer:
Substitution, missense mutation
Explanation:
Mutation is a change in the DNA sequence that can subsequently alter the genetic message.
Substitution mutations occurs when a base is replaced with another different base.
A good example is the one given in the question where the third A in the sequence ACAAAC is replaced by a T.
If this kind of mutation occurs in a protein-coding gene, it will be classified as a frameshift mutation.
Missense mutation is caused when there is a change in a single nucleotide that results to the coding of a different Amino acid
Agriculture changed the world and the way of eating. It all started with nomadic settlers or Hunter-Gatherers. It made the way we eat much easier to the point where we don't have to go searching for food when we could grow crops and plants ourselves.
Soil is the basis of farming. It delivers water and nutrients to crops, Physically supports plants, Helps control pests, and protects the quality of drinking water, air and wildlife habitat. The goal of soil management is to protect soil and enhance its performance so you can farm profitably.
