Answer:
False
Explanation:
Punctuated equilibrium is that there is rapid change during short periods of time.
Though they are an exception, the Inuit traditionally ate a very high fat diet from coldwater mammals like walrus and obtained omega - 3 fatty acids from it and fish oil and had a very low incidence of cardiovascular disease. It has been determined that they have a genetic disposition to be able to survive if not thrive on this diet. Modern man, on the other hand normally cannot survive on a high fat diet as it will most likely lead to heart disease due to increased cholesterol. Interestingly enough though is Dr Atkins diet which is a low carb relatively high fat diet.
Answer:
False
Explanation:
Cartilage prevents the bone ends from rubbing directly on to each other while the muscles contract to move the bones associated with the joint.
Cartilage can bend some but not too much or it breaks
Answer:
The efficiency of the hair dryer is 0.2 or 20%
Explanation:
The efficiency of a machine or any appliance is a measure of the useful work done by the machine when an effort is applied to the machine. The higher the efficiency of a machine, the more useful work the machine does.
Due to the economical and environmental impact of energy production, machines and appliances of high efficiency are being developed and recommended for domestic as well as industrial use nowadays.
In electrical appliances, energy is usually supplied by electrical power units. The higher the efficiency of an electrical appliance, the less power it consumes to do useful work. For a hair dryer which takes in 3000 J of energy per second and transfers 600 J of useful heat energy, its efficiency is calculated with formula below:
efficiency = useful energy / total energy input
Efficiency = 600 J / 3000 J = 0.2
Therefore, the efficiency of the hair dryer is 0.2 or 20%
The correct answer is A. The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning.
Explanation:
This diagram shows how a primitive cell or a cell containing only genetic material evolves into a complex cell with specific organelles such as chloroplast or mitochondria by engulfing or integrating other cells, especially prokaryotic cells that continue living in the primitive cell and become specialized organelles. This process supports the theory the evolution of cells was possible as simple cells engulfed bacteria because as the diagram shows the engulfed bacteria evolved into organelles that make the cell become more complex as there were specific structures in the cell for different functions.