Answer:
22 breathes per minute
Explanation:
Respiratory rate:
It is the amount of breaths consumed per minute. The usual respiration rate for an adult that is not actively involved in any work is 12 to 20 breaths per minute. A respiration rate that is below 12 or above 25 breaths per minute while not actively involved in any work is considered abnormal.
MV = TV*(breaths/minute)
4.4 =2 * B/M
B/M=4.4/2
Therefore,
In our question, Respiratory rate is equivalent to 22 breathes per minute
MECHANICAL WEATHERING:
Mechanical weathering is defined as a natural process. It occurs when big rocks are broken down into smaller rocks. Sometimes you will hear it referred to as “physical weathering.” There are lots of different things that can cause physical weathering. For example, temperature changes and rain can both cause weathering.
<h2>Answer : Meteor impacts, Volcanic gases, and Milankovitch cycles.</h2><h3>Explanation : </h3>
As per the question attached the major factors that affected the earth's changing climates are -
Meteor impacts, volcanic gases, and Milankovitch cycles.
These are those factors which drastically impacted the climate on earth.
Meteor impact involves the entry of a small meteoroid into the Earth's atmosphere which changes the climate of earth.
Volcanic gases from the volcanoes increase the climatic temperature.
Milankovitch cycles determines the climatic changes in earth by the relative changes in the earth's revolution around the sun.
Plant cells are like a rectangle. Animal cells are like a circle. Plants cells are different from animal cells because they are like a rectangle while animal cells are a circle
Individual with genotype AaBBCC has the dark skin colour.
Explanation:
The skin colour is a polygenetic trait i.e two or more genes control the particular characteristic in an individual.
The amount of gene in the individual in such cases would determine the skin tone.
It is given that dominant alleles are responsible for darkest colour of the skin in the example. We could see that the genotype AaBBCC has maximum dominant alleles which makes us to deduce that individual with this genotype will have dark skin phenotype.
This quantitative occurrence of alleles in the individual decides its skin colour and variations in it.
The genes are independent of each other but have an additive effect on the phenotype like skin colour.
