Answer:because it would change the world of life and how it spins connect to the living things
Explanation:
Explanation:
-increases genetic variation
-increases the fitness of a species
Further Explanation:
All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. To produce daughter cells during cell division, the chromosomes (total number of chromosomes (2n)) are copied before the cell splits into two daughter cells. This process is known as mitosis, and occurs in cell division and growth processes. Two new nuclei are formed, along with identical cells. These are the same as the parent cell and the chromosome number (2n) is maintained.
Conversely in meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells (sperm or eggs), each containing half the number of chromosomes as its parent cell. During the process of cell division, spontaneous changes within the genome can arise. These mutations are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes. There are two types:
- somatic: these only occur within certain cells, and arise from environmental factors such as UV light
- hereditary: occur within germ cells of the parent and later the fertilized egg which forms a zygote; these are present within all cells of the new organism.
Like other events, such as crossing over during mitosis and meiosis, mutations lead to increases in genetic variation. This variation refers to the genetic characteristics present within a species. Mutations are maintained within cells, as they form new traits called alleles, which may confer adaptations that increase the fitness of a species, along with ensuring survival by conferring a protective advantage
.
e.g. sickle cell anemia, a disease caused by a mutation, confers protection against the disease malaria.
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Answer: Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
Answer:
Two substances which are selectively reabsorbed from the tubules of a nephron are Amino acids and Glucose.
Explanation:
The majority of the vital nutrients (which do not have to be discharged out) are recovered by the bloodstream out from tubule of the nephron all through re - absorption, a key procedure in urine production that primarily takes place in the PCT of the nephron. Proximal tubule includes unique cuboidal epithelial cells having microvilli towards the lumen for completing this. Higher substance reabsorption is a result of this. Because glucose and amino acids seem to be essential to the organism, hence the nephron's tubules reabsorb them. Moreover, sodium, water and other ions like sodium can also be reabsorbed by nephrons. Furthermore nephron tubules are in charge of waste product elimination and nutrient absorption.
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