Answer:
Explanation:
First, let’s define population. A population is all of the organisms of the same species that live in a certain area.
Now, let’s analyze the answer choices.
A: All of the different kinds of fish that live in a lake.
This is not a population, because a population is one species, and this is all the different species of fish.
B. All of the living and nonliving things that interact in and around a lake.
This is also not a population. A population is just one species, while this includes all the biotic and abiotic factors.
C. All of the trout that live in a lake.
This is a population. Trout are one species, and it is all the trout in one specific area.
D. . All of the fish, bacteria, and mammals that live in a lake
This is not a population. Fish, bacteria and mammals are too many species for a population.
Therefore, the correct answer is C. all of the trout that live in a lake.
Mass and a stars mass is determined by the amount of matter available in its nebula
Answer:
Explanation:
There are a few key structural differences between plant cells and animal cells.
Below are a few of the main ones:
Plant cells are generally larger than animal cells.
Only animal cells have lysosomes (however, recent, and controversial, research suggests that some plant cells may have lysosomes), and only plant cells have chloroplasts.
While plants cells have a rigid cell wall, animal cells have a thin and flexible plasma membrane.
Plants cells have a large central vacuole and animal cells have many small vacuoles
<span>The scientific community needs to communicate.
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A universal system reduces the confusion when different systems of measurement are used and makes it easy to compare measurements taken by different persons.
Here’s a real-world example of the confusion that can occur.
In 1983 an Air Canada Boeing 767 temporarily had no working fuel gauges, so the ground crew resorted to calculating the 767's fuel load by hand. They used a procedure similar to calculating the volume of oil in a car by taking a dipstick reading. This gave them the volume. But airlines measure the amount of fuel by mass. They needed the density of jet fuel to make the proper calculations.
The ground crew used 1.77 lb/L as the density, as they had on all other planes in the fleet. But the brand new 767 was metric and used 0.8 kg/L as the density. The plane had only about half the fuel the crew believed they had. The plane ran out of fuel and sank too fast to reach its destination. Only a nearby abandoned Air Force base was a possible landing spot. The crew made a remarkable dead-stick glider landing. There were only minor injuries to the passengers as they used the emergency exits on the plane.
