The subject of Earth and Space Science is a vast topic. The subject reaches from the depths of the ocean floor, to the fossils and minerals within the rocks you stand on, to the furthest point beyond our galaxy, and everything in between. Whether they’re studying the weather or natural resources here on Earth, or modeling future climatic changes and space missions, scientists that study topics within the field of Earth and Space Science make critical discoveries about the past, current, and future Earth. Think of a topic of interest to you within the subject of Earth and Space Science. How might the daily activities of a scientist studying that topic or field differ from a chemist, physicist, or biologist? How might it be the same? In what ways would the scientist likely use the scientific method? Which types of data would they likely analyze most often?
i would like a simple answer please.

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:

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: