Answer:
The nuclear membrane dissolves, and spindle fibers form.
Explanation:
This occurs during prophase. the chromosomes become shorter and thicker. The centrioles migrate to the opposite poles. The nuclear envelope is broken down, the nucleolus disappears, and microtubules attach to the chromosomes at the kinetochores present in the centromere. Microtubules that are associated with the alignment and separation of chromosomes are referred to as spindle fibers. Chromosomes visible under a microscope are connected at the centromere. In meiosis, the homologous chromosomes break in their DNA strands at the same point, following a recombination of the fragmented parental DNA strands into non-parental combinations, known as crossing over.
ANSWER:
When a habitat is destroyed, the carrying capacity for indigenous plants, animals, and other organisms is reduced so that populations decline, sometimes up to the level of extinction. Habitat loss is perhaps the greatest threat to organisms and biodiversity.
Answer:
a. 500
Explanation:
The effective size of a given population is calculated by simply counting the total amount of organisms that actually are in conditions of reproduce and produce certain offspring in the next generation. In this particular case, althugh the population is formed by a total of 1000 individuals, only 500 organisms are capable of reproduce at that particular instant, and therefore contribute with offspring to the next generation.
100 percent, because if both parents have the same genotype of Tt then most likely the child will have 100percent.