The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.
Answer:
C. When the chest volume expands, air can now rush in through the puncture without filling the alveoli.
Explanation:
During inhalation, the contraction of the diaphragm and the external intercostals increase the volume of the chest cavity. As the chest cavity expands, the alveolar pressure become lower than the atmospheric pressure resulting in the flow of air into the lungs in response to the pressure gradient.
The chest cavity is an airtight chamber. This ensures that any changes in the volume of are chest cavity corresponds to the volume of the lungs. If a lung is punctured, the air would not fill the punctured lung but would escape through the hole. Therefore, the punctured lung would not be filled with air during inhalation.
Frequency of allele a1 is 75%, p=0.75
Frequency of allele a2 is 25%, q=0.25
If a population is in Hardy-Weinberg equilibrium then:
p2+2pq+q2=1
<span>p2 is the frequency of genotype a1a1 (homozygous),</span>
2pq is the frequency of genotype a1a2 (heterozygous),
q2 is the frequency of genotype a2a2
<span>The proportion of individuals with genotype a1a2 is then 2*0.75*0.25=0.375 (37.5%).</span>
I is Nucleus, and H is Cell Membrane
Answer:
B
Explanation:
When an animal eats a plant, the energy doesn't change to radiant energy because it's eaten and it isn't living to produce radiant energy.