I would say the answer is A I really hope this helps! :)
Answer:
A vertebrate is anything with a backbone. Mammals, Amphibians, Reptiles, Birds, and some fish. These organisms with a backbone would be categorized as Phylum Chordata. (Chordates, meaning chord, or spinal chord).
Explanation:
Explanation:
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.
Mitochondria: supplies energy to the cell
Nucleus: Control center of the cell; contains DNA
Ribosomes: makes proteins inside cell
Cell membrane: protective layer of the cell
Hope this helps :)
The role of carbohydrates<span> is to provide energy, as they are the body's main source of fuel, needed for physical activity, brain </span>function<span> and operation of the organs. All the cells and tissues in your body need </span>carbs<span>, and they are also important for intestinal health and waste elimination.</span>
