Answer:
Blood, the heart pumps oxygen-poor blood to the lungs to be oxygenated.
Explanation:
:) Merry Christmas!
Answer:
Option C, As elevation increases, air pressure decreases, molecules spread out, and air temperature cools.
Explanation:
As we move towards the sky the number of air particles reduces and hence its density also reduces. Due to lesser number of particles the pressure exerted by air also reduces at high elevations.
As per the gas law
Where P is the pressure, V is the volume, n is the number of mole, R is the gas constant and T is the temperature.
Gas law states that if volume is constant, the relation between temperature and pressure is proportional.
Thus, if pressure is reducing the temperature will also reduce.
Hence, option C is correct
Answer:
50
Explanation:
A typical monohybrid cross gives 3 dominant: 1 recessive progeny in the F2 generation. According to the given information, the allele for short height is dominant since it is expressed in the F1 generation obtained by crossing two pure breeding tall and short soybean plants.
A cross between two heterozygous short soybean plants would obtain F2 generation in the following phenotype ratio=
3 short (dominant): 1 tall (recessive).
The proportion of tall plants in F2 generation is =1/4
Therefore, the number of tall plants in F2 generation = 1/4 x 200 = 50