What two recurring events in earth’s history have an impact on the carbon cycle? a)earth’s orbit and climate change b)solar events and eclipses

A earth orbit and climate change

a. Earth’s orbit and climate change

Explanation:

Over the years, the carbon cycle has seen changes in response to climate change. The amount of energy has varied in comparison to the changes is the earth’s orbit. The development of ice ages has seen a slowdown in the carbon cycle.

Similarly, temperature variations and climate changes initiated by the burning of fossil fuels have deeply impacted the carbon cycle by increasing the ratio of carbon dioxide in the atmosphere causing global warming. Therefore, the earth’s orbit and climate change are two recurring events in the Earth’s history that have impacted the carbon cycle.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

b. lithosphere, asthenosphere, mesosphere   is the answer most likely