Select all of the following conditions which can be caused by extreme cold. 1.heat stroke 2.frostbite 3.heat exhaustion 4.hypothermia

2 and 4.

Explanation:

Frostbite is the causing of parts of your body getting to cold. Hypothermia is another cause of the cold. Both of the other ones are causes of heat

2, and 4. Frostbite, and Hypothermia.

Explanation:Heat stroke is cause by to much heat beeing trapped in your body, with no way of getting out. Fristbite is caused by the liquid in your body begining to freeze in your extremidies. Heat Exaustion is caused when you get really hot, and have not consumed enough liquid, this leads to dehydration. Hypothermia is when your body loses heat faster than it can produce heat, causing a dangerously low body temperature.

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: