Answer:
Genes are passed down to children by the process of meiosis. Meiosis includes gametes (sex cells). Most cells in our body are diploid, they have 23 pair of chromosomes (46 in total). 23 come from our father and 23 from our mother. The gametes are haploids, which mean that they only have one copy of each chromosome. The gametes are formed by meiosis, which leads to genes being passed onto children. Meiosis is where a normal diploid cell divides to make four non-identical haploid cell. First, each chromosome makes a copy of itself. The pairs of chromosomes line up and divide. The two new cell divide again creating 4 new daughter cells, each with a single set of chromosome. Each new sex cell has a combination of the genetic material from the mother and the father. Now when a sperm fertilises and egg, a new combination of chromosomes are created. This is a diploid cell, which then divides to create a zygote (baby). The baby now has the genes (genetic material) from the parents.
Explanation:
Hope this makes sense!
Answer:
It’s no surprise that the digestive system is directly linked to the immune system. Whether or not the immune system is at it’s peak depends on the healthiness of the digestive tract.
The digestive system is responsible for your overall well-being. It breaks down the food you eat into essential nutrients that help repair cells, stimulate growth, and give your body energy. The digestive system also protects your body from harmful invaders that could disrupt healthy living. There are bad bacteria present even in the most nutritious foods you eat that the digestive system is constantly fighting. In order to do this, good bacteria in the gut, specialized immune cells, and hormones work together to keep the GI tract at its optimum level.
Explanation:
1.The presence of valves 2.the milking action of skeletal muscles 3. the veins as the muscles contract