Answer: No, mRNA ( messenger RNA) model does not closely resemble the DNA strand from which it is transcribed.
This is because mRNA strand is complementary to the strand of DNA template that is used in its synthesis during the process called transcription. The polarity of DNA template is 3' to 5' whereas that of mRNA transcribed is 5' to 3' that is both the strands have antiparallel polarity.
This is the reason template DNA is referred antisense. mRNA strand more closely resembles the sense strand ( which is complementary strand of DNA template in a double helix).
Answer:
The rabbit population will decrease, due to the increased fox population.
Explanation:
Predator-Prey system usually experience changes that are cyclic. This occurs because the availability of the foods influences the population size. So, if there is not enough food for the predator (prey), their population will decrease in size. On the other hand, population of predator also has influence on the pray: population of prey will grow if there is decrease in population of predators.
Answer: Contractile vacuole of amoeba will shrink/contract when the organism is placed in sea water.
Contractile vacuole is a subcellular structure ( mainly found in protists) that is involved in the regulation of water quantity inside a cell.
As we know that water always flow from a hypotonic ( where solute concentration is less) to a hypertonic ( where solute concentration is more) solution. Sea water is a hypertonic solution as the concentration of salt is very high. Therefore, in this case, water will flow from contractile vacuole to outside of the organism.
Thus, contractile vacuole of amoeba will contract as it will lose water when placed in sea water.
Answer:
334.48
Explanation:
delta T = 4 degrees
m = 20 grams of water
c = 4.181 J / gram
E = 20 * 4.181 * 4
E = 334.48 Joules
Remember to change c to Joules / gram
4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram
