Answer:
Dogs were probably domesticated by accident, when wolves began trailing ancient hunter-gatherers to snack on their garbage. Docile wolves may have been slipped extra food scraps, the theory goes, so they survived better, and passed on their genes. Eventually, these friendly wolves evolved into dogs
Explanation:
Answer: DNA has thymine as one of the two pyrimidines while MRNA has uracil as its pyrimidines base.
Answer:
Animals and humans depend on plants for many things, and without plants, there could be no life on Earth.
Explanation:
1. Plants are the primary producers. They are the only organisms that can make their own food. Animals, who are incapable of making their own food, depend on plants for their supply of food.
2.The oxygen that animals breathe comes from plants. Through photosynthesis, plants take energy from the sun, carbon dioxide from the air, and water and minerals from the soil. They then give off water and oxygen. Animals then use oxygen process called respiration. Respiration is the process used by organisms to release energy from food, and carbon dioxide is given off.
3.Plants also provide habitat for many species of animals. The plants provide food, shelter from weather (rain, sun), nesting place, sleeping ground and hideout from predators.
For example: Different animals live in different parts of the rainforest. Scientists divide the rainforest into zones based on the living environment.
Answer:
The James-Lange theory of emotion.
Explanation:
According to the James-Lange theory, emotion is equivalent to the array of physiological arousal resulting due to external incidents. The two scientists indicated that for someone to feel emotion, he or she must first encounter with bodily responses like increased heart rate, increased respiration, or sweaty hands.
Once this physiological reaction is determined, then the individual can suggest that he or she is feeling the emotions. This is in contrast to the general common-sense way of thinking regarding the cause and effect association between the experience of emotion and its expression.
Crossing over is done in Pachytene stage of meiosis 1 !!