Answer:
The change in mass of the bag was greater when it contained 20% fructooligosaccharides than when it contained 15% fructooligosaccharides because more water moved into the bag with 20% fructooligosaccharides than with 15% fructooligosaccharides.
Explanation:
Diffusion is the movement of substances from an area of high concentration to an area of comparatively lower concentration. Diffusion is said to be complete when both compartments/regions have equal concentration of the substance. The rate of diffusion increase with increase in concentration gradient, increase in temperature, and decrease in size of the diffusable substance.
In our example, the two compartments are the compartment in the diffusion beg which contains fructooligosaccharides and the compartment in the beaker which contains more water, because water (diffusing substance) moves from the beaker where it is more in concentration to the bag, where it is lesser in concentration. The bag, when it contained 15% fructooligosaccharides had relatively more water before diffusion than the bag when it contained 20% fructooligosaccharides, as a result of this, when diffusion starts, it will take a lesser volume of water to move into the 15% bag to attain equilibrium than it will take for the 20% fructooligosaccharides bag to attain equilibrium. Meaning that more water will move into the bag when it contained 20% fructooligosaccharides than 15% fructooligosaccharides making the overall volume in the bag higher.
Let me use hypothetical values; assume that before diffusion, both (15% and 20%) bags weighed 50 g of the solute (fructooligosaccharides) each, but had different concentration of the solute. Let us also assume that by the time 10g of water moves into the 15% bag, it attained equilibrium, bringing the total weight in the bag to 60g. It will take more than 10g of water to move into the 20% bag before it attains equilibrium, lets say it take 18g of water to move into the 20% bag to cause equilibrium, total weight of the 20% bag becomes (50 + 18 = 68g), hence the mass of the 20% bag will be higher than the 15% bag at equilibrium.
<u>Less reproductive </u><u>isolation </u><u>among populations that share similar </u><u>habitats</u><u>.</u>
What is habitat reproductive isolation?
- Habitat isolation is the term for when populations of a species move to a new habitat and settle in an area where they no longer overlap with other populations of the same species.
- When reproduction with the parent species stops, a new group emerges that is genetically and reproductively independent.
What factors affect reproductive isolation?
- The members of different species will be reproductively isolated by any factor that prevents potentially viable individuals from coming together.
- Different habitats, physical barriers, and a variation in the timing of sexual development or flowering are examples of the different types of barriers that can result in isolation.
Learn more about reproductive isolation
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Answer:
Adaption Purpose
Large surface area To absorb more light
Thin Short distance for carbon dioxide to diffuse into leaf cells
Chlorophyll Absorbs sunlight to transfer energy into chemicals
Network of veins To support the leaf and transport water and sugars
Explanation:
Answer: This is because a parent with type AB blood has both A and B antigens therefore, the child must inherit either A or B antigen from the parent.
Explanation: In ABO blood type, blood types are classified on the basis of the antigens present in the red blood cells. There are two types of antigens: A and B antigens.
A blood type is so named because it has A antigens, B blood type has B antigens, AB blood type has both A and B antigens while O blood type has no antigens.
Each of these blood types is controlled by two alleles, and children inherit one allele from each parent. If a parent has AB blood type, none of his offsprings will have O blood type because each offspring must inherit either antigen A or B from this parent.
Answer:
1. The correct option is D.
Explanation:
The biochemical reactions that occur in human biological systems are of two types based on the amount of heat required, they are exergonic and endergonic reactions.
Exergonic reactions are those biochemical reactions that release energy into the environment. The free energy (Delta G) of this type of reaction is negative. Endergonic reaction on the other hand are those reaction that absorb heat energy from their environment. The free energy of these reactions are positive.
Because endergonic reactions need extra heat energy to occur, enzymes that catalyze endergonic reactions usually bind to ATP. ATP is the energy currency of the cell and it provides the necessary energy that the reaction required to occur.
2. The correct option is B.
Both nucleic acid and phospholipids have phosphate groups in their structure. Generally, the structure of nucleic acid is made up of nitrogenous bases (uracil, thymine, adenine, guanine and cytosine), pentose sugar (either deoxy-ribose or ribose) and phosphate groups. Nucleic acids are of two types, RNA and DNA.
The phospholipid structure on the other hand is made up of fatty acids and phosphate groups. Phospolipids are the major types of lipid that make up the cell membranes of living cells.
Comparing the structures of the two molecules show us that the two molecules have phosphate groups in common.
