Answer: D, lunar are 29.5 days, calendar are 28 to 31 days
Explanation: 1. average lunar month lasts 29.530575 days or 29 days, 12 hours, 44 minutes, and 2 seconds, a few days short of a calendar month. The orientation of the illuminated side of the Moon in the Northern Hemisphere. A lunar month is the time it takes the Moon to go through all its phases.
Answer:
The Sun is basically the Sun is the original source of energy.
Answer:
Allele frequency
Normal allele 
Mutant r allele 
Genotype frequency
Homozygous normal bugs 
Homozygous mutant bug 
Heterozygous normal bug with one mutant r allele and one normal allele 
Explanation:
It is given that 99% of the bugs were killed after the spray of pyrethrum. This suggests that 1% of the bugs that were not killed must be homozygous for the mutant type allele "r"
Thus, the frequency of homozygous "rr" species i.e 
From this we can evaluate the frequency of mutant "r" allele.
Thus, 

As per Hardy-Weinberg first equilibrium equation, 
Substituting the value of q in above equation, we get

Thus, the frequency of homozygous normal bug is equal to

As per Hardy-Weinberg second equilibrium equation-

Substituting all the available values we get -

Allele frequency
Normal allele 
Mutant r allele 
Genotype frequency
Homozygous normal bugs 
Homozygous mutant bug 
Heterozygous normal bug with one mutant r allele and one normal allele 
Understanding Geologic Time<span>
Introduction</span>
Geologists at the American Museum of Natural History study rock layers and the plant and animal fossils found in them. They use radiometric dating to help establish the age of rocks. In doing so, they also establish the age of the fossils found in rocks. From the evidence they gather, geologists can piece together the physical history of the Earth.