During the vernal equinox, what occurrence takes place that happens only twice a year? The Sun’s rays are perpendicular to the Tropic of Cancer, causing 12 hours of daylight on both Northern and Southern Hemispheres.

The Sun’s rays are perpendicular to the Equator, causing 12 hours of daylight on both Northern and Southern Hemispheres.

The Sun’s rays are perpendicular to the Tropic of Capricorn, causing 12 hours of daylight on both Northern and Southern Hemispheres.

The Sun’s rays are perpendicular to the Prime Meridian, causing 12 hours of daylight on both Northern and Southern Hemispheres.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

your spelling is a little off : ]

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.