Answer:
D. Several cells are in the process of dividing into two new cells
Explanation:
The universal cell theory which was proposed in 1838 and contributed by three scientists namely: Theodor Schwann, Rudolf Virchow, and Mathias Schleiden, consists of three components namely:
1) Cell is the basic and functional unit of life
2) All living organisms are made up of one or more cells.
3) All existing cells arise from pre-existing cells.
Hence, in this question involving a scientist who is observing living Cells in a Petri Dish under a Compound Light Microscope, the observation that "Several cells are in the process of dividing into two new cells" provides evidence to support one of the three components of the cell theory ( all living cells arise from preexisting cells).
The mixed number for the given picture is 1 1/4, the correct option is A.
<h3>What are mixed numbers?</h3>
A mixed number is one that manages to combine a whole number and an appropriate fraction.
To transform mixed numbers to improper fractions, follow these three steps: Multiply the numerator by the whole number.
- Step 1 is to the numerator, add the answer from.
- Step 2 is adding the numerator to the product got from step 1.
- Step 3 is writing the improper fraction with the sum got from step 2 in the numerator/denominator form.
In the given picture, there is one box completely filled and one forth portion in second block is filled, so it is representing mixed number i.e., 1 1/4.
Thus, the correct option is A.
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Answer:
The correct answer is osmosis is the movement of water across the membrane;diffusion is the movement of molecules from a higher to lower concentration with or without the presence of membrane.
Explanation:
Diffusion and osmosis are the two most important process of passive transport.Both diffusion and osmosis helps in the movement of water molecules from high water concentration region to region of low water concentration until equilibrium in both sides is reached.
Osmosis needs the presence of a semipermeable membrane to occur.
<em><u>Trees </u></em><em><u>provide </u></em><em><u>socio-economic benefits</u></em><em><u> by creating a friendly environment that lures more customers to the shopping areas they are found.</u></em>
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Trees are very important to our environment for the following reasons:
- They release oxygen during photosynthesis, thereby producing oxygen for humans
- Trees take in carbon dioxide during photosynthesis, thereby purifying the atmosphere and limiting greenhouse effect.
- They also beautify the environment
- Trees serve as shades for humans
All these importance of trees is what will definitely lure people to go to shopping areas that have trees planted in them.
This means that, trees boost sales of businesses wherever they are planted. In this way, we can state that because trees create a friendly environment, people are lured where trees are and they spend more money there, and so therefore, it serves as social or economic benefit.
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If you categorize humans into large groups based on physical characteristics such as facial features and hair texture, you are relying on which form of categorization?
A. political identity
B. race
C. class- consciousness
D. ethinicity
Answer:
B. Race
Explanation:
Human races are the distinct human populations that are classified and are different from each other with respect to one or other morphological traits. It generally takes into account of the traits such as skin color, hair structure, etc. Mongoloid and negroids are two races of the human that are found in distinct geographical regions and exhibit some distinct traits that are not expressed in the humans of other races. This classification does not consider the ability of mating to produce fertile progeny.
