False only self pollinating plants can do that they can cross pollinate and mate with each other
Answer:
B) The birds are unable to get calcium from the soil because the calcium has been leached out by the acid rain
Explanation;
- Calcium is needed by birds in large quantities for the development off the egg shell production and for healthy growth of newborn chicks
- Calcium cannot be stored in the skeleton of the birds since it would make them too heavy and can easily be attacked by predators.
- Therefore the birds have to get calcium directly from its source and eat it.
- Lack of calcium in the soil lead to lack of a source of calcium for the birds thus their eggs might end up failing to hatch due to the small holes on its shell and once there is air in the egg shell no hatching can take place leading to decline in population.
The mechanisms of reproductive isolation are a collection of evolutionary mechanisms, behaviors and physiological processes critical for speciation. They prevent members of different species from producing offspring, or ensure that any offspring are sterile
Sister chromatids separate during meiosis.
Meiosis:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. During reproduction, when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring.
Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome. The parent cell undergoes one round of DNA replication followed by two separate cycles of nuclear division. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
