A plant cell has a cell wall and an animal cell doesn’t. The cell wall keeps it from moving and protects the plant.
Answer:
Proximal convoluted tubule
Explanation:
The major work of re-absorption is carried out in nephron by the proximal convoluted tubule (PCT). The PCT re-absorbs all the essential nutrients such as amino acid, potassium, glucose etc. and water driven by passive transfer based on concentration gradient. Along with gradient, pH of the urine also affects the re-absorption. Based on the pH of the urine (basic or acid), re-absorption of ionized acid increases or decreases.
Answer:
Work = 92,704.5 joules
Power= 154.5 watts
Explanation:
Given that:
Time= 10 minutes
treadmill grade = 15% = 0.15
horizontal speed = 90 meters/min
subjects weight = 70 kg
To calculate the total work, we have;
work = force × distance
force = mass × acceleration
= 70 × 9.81
= 686.7N
Also, distance = speed × time × fractional treadmill grade
∴ distance = 90 meters/min × 10 min × 0.15 (treadmill grade)
Total work can therefore be calculated as:
work = force × distance
work = 686.7N × (90 meters/min × 10 min × 0.15 (treadmill grade) )
Work = 92,704.5 N/m
Work = 92,704.5 joules
To calculate the power, we have;
Power = workdone/time
Power = 92,704.5 joules/600 seconds
Power = 154.5 joules/second
Power= 154.5 watts
A) The answer is 0.1/year.
The reproductive rate for the population can be expressed as:
(number of births - number of deaths)/number of individuals = (55-5)/500 = 50/500 = 0.1
b) The answer is exponential growth.
The exponential type of population growth occurs
when resources are unlimited. <span>When there are no limiting factors, population
exhibits exponential growth. If every year population has mentioned reproductive rate, that means it is not limited by any factor (food, space, etc.). Thus, it must be exponential growth.</span>
Molecules are moving because they have energy. As the liquid cools down, the amount of energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice. Even in this solid stage, the molecules are still moving – we just can’t see it.