Answer:
The animals present body structure is due to evolution. It is seen in each part including the structure of the heart. The vertebrate heart becomes complex from a simpler form.
Invertebrates, the heart of fishes is two-chambered having one auricle and one ventricle. The deoxygenated blood gets purified in the gills. They are aquatic and no lungs for breathing. The hearts pump a mixture of oxygenated and deoxygenated blood to the body.
The amphibians and reptiles have 3 chambered heart as they lead terrestrial mode of life. The gills modified into the lungs. The left auricle receives pure blood and the right auricle receives deoxygenated blood. The blood purified in the lungs and in the ventricle, both types of blood get a mix. The ventricle pumps the mixed-blood throughout the body.
In the case of birds and mammal, the heart is 4 chambered and the oxygenated and deoxygenated blood are separated. These two are higher vertebrates. No mix of pure and impure blood, the body receives only the oxygenated blood.
This shows to construct the phylogenetic tree of vertebrates - the fishes should be in the bottom, and above it amphibians, reptiles, then, mammals and birds on the top branch of the tree. As the chambers and structure of the hearts modified one after another.
Yes, it is possible that evolution occurs in this case.
At first, the new insecticide is effective against the boll weevil. Spraying the insecticide will kill the boll weevil in a way. The insecticide might attack boll weevil enzyme or any part of its organs.<span>
But some of them might have a mutation that renders the insecticide ineffective. The mutation probably happens to DNA that code the enzyme or protein that targeted by the insecticide, makes the insecticide completely ineffective.
The next spray will kill all old organism, leaving the new resistant organism in less competition area. This will allow the resistant organism to grow fast and eventually replace all the old organism in the area.</span>
Answer:
Unicellular organisms may stay as one cell but they grow too. Multicellular organisms add more and more cells to form more tissues and organs as they grow. ... Growth is the increase in size and mass of that organism. Development involves the transformation of the organism as it goes through the growth process.
Explanation:
Yes they can
<span>Emotional quotient (EQ) , which is a measure of emotional intelligence (EI) , is the ability to to identify one's own emotions including the ability to differentiate and decipher emotions in people, pictures, voices, and cultural artifacts. The ability to process information of an emotional nature and relate those emotions to a wider cognition ability differ in humans. People with higher eq are more self-aware, this enables them to harness the mood (strength, lerthagy, weakness) during learning. They can tell based on the emotions of respondents whether the atmosphere is conducive for learning or not. A person with a high eq can capitalize fully upon his or her changing moods and others to best fit the task at hand. It enables them to harness emotions to facilitate various cognitive activities, such as thinking and problem solving. Unlike someone with low eq a person with high eq can harness emotions, even negative ones, and manage them to achieve intended goals.</span>
