A. A <u>wind vane</u> measures the wind direction and <u>anemometer</u> measures the wind speed.
B. When rising air cools, it can lead to clouds and precipitation because cool air can hold less water vapor.
C. Sinking air <u>warms</u> and causes evaporation of clouds, thus fair weather
D. Isobars means bars of equal pressure, ‘iso’ meaning ‘equal’ and ‘bar’ representing a unit of pressure, so together isobar means bars of equal pressure. Isobars or lines of equal pressure may be packed together indicating a <u>strong</u> pressure gradient
E. Pressure gradient is the difference in pressure between high and low pressure areas. The strongest winds are in areas where the pressure gradient is the <u>greatest</u>.
Explanation:
A wind vane is an instrument which spins according to the wind direction.
An anemometer is a meteorological instrument that measures the wind speed, direction and pressure.
Rising air cools while the sinking air warms according to the adiabatic cooling/warming principles. Warm air holds more moisture than cold air.
Isobars are unique features on a weather map represented by lines connecting areas with equal pressure gradients. According to the pressure gradients, the isobar spacing is arranged.
1/4 recessive can be expected for the recessive trait of mono hybrids from the F2 generation.
Option D
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Explanation:</u></h3>
Mono hybrid cross is defined as the crossing between two plants considering the two different alleles of a particular character. It was 1st performed by Father of Genetics, Sir Gregor Mendel. The mono hybrid cross done by him considered the character tallness of garden pea plants, of which one was tall and other was short.
He crossed them to get all tall plants in 
Filial generation. Now as he self bred those plants, he got the tall and short plants in ratio of 3:1. Thus he proved that the recessive trait of mono hybrids is 
of the total population of F2 generation.
