It was probably because when a area had too much pollution, they could easily migrate away somewhere else by flying, while humans have to stay everywhere. Another reason could've been that birds can adapt to places quicker than other animals.
Hope it helps!
Answer:
meiosis (soso srry if im wrong)
Explanation:
A "hypothesis" is just an idea or proposal which someone comes up with
to try and explain a given set of observations. A hypothesis must be:
a)
falsifiable/disprovable
b) testable
c) have predictive value, in
order to be taken seriously by scientists, and to begin its journey
towards the status of "theory".
If it is an interesting proposal and is
deemed to possess these 3 criterion, scientists will start to
investigate it: what can it predict, what does it explain, is it
compatible with all the relevant data/observations? If it is supported
by enough experiments and/or observations, and gains acceptance by
enough of the "scientific establishment" (ie, by enough scientists who
are accepted and admired by their peers), at some undefinable point it
becomes a "theory". It can still be disproven at any time, but until
that happens it will remain a "theory" and may even graduate to the
status of "well supported theory", such as the theory of gravity or
relativity. At NO point, however, is ANY theory ever considered by
scientists to have been "proven": in the scientific world, all truth is
"relative". and provisional.
Answer:
centimeter
Explanation:
Description:
- used to measure length
- smaller than a meter
All answer choices are units that are used to measure length so the first hint isn't much help.
The only unit listed that is smaller than a meter is a centimeter so the answer would be centimeter.
1 Centimeter = 0.01 Meter
( If it helps to remember centi means one hundredth, so centimeter means one hundredth of a meter )
So Mendel got roughly 75% yellow and 25% green in f2. This means that f1 contains all heterozygous genes, as shown below
Y y
Y YY Yy
y Yy yy
Summary: 75% YY or Yy, 25% yy
Which means that green (y) is a recessive phenotype, while yellow (Y) is a dominant phenotype, since plants with heterozygous genotype Yy express the yellow trait.
