Answer:
Human diploid cells have 46 chromosomes
Explanation:
c. variation
b. over production of offspring
d. all of these
The answer is a. natural selection.
In natural selection, genotype variations that will increase the chance of survival and reproduction of some organism are preserved and will be inherited. Darwin's theory suggested that there are variations among individuals in a population and that these variations will help individuals to survive. According to Darwin, natural selection is the only factor that affects frequency of different variations.
b: mitosis is not regulated in tumor cells
c: tumor cells use meiosis to replicate
d: there are no chromosomes in tumor cells
answer please
The correct option is: b. mitosis is not regulated in tumor cells. Cancer cells are malignant tumor cells and cancer is a disease of mitosis where the cell divides uncontrollably.
The tumor cells use mitosis to replicate and and cell cycle checkpoints are ignored so the mitosis is unregulated. So option c. tumor cells use meiosis to replicate is incorrect.
Tumor cells contain abnormal number of chromosomes so option d. is incorrect as it contains chromosomes.
Due to aneuploidy of tumor cells it cannot be specifically haploid or diploid so option a is incorrect.
The mitosis is not regulated in the tumor cell that makes it different from a normal cell. The other characteristics are cell shape, nucleus shape, chromatin, and growth rate, etc.that make it different from a normal cell.
Further Explanation:
The difference between normal cells and tumor cells are listed in table 1 attached below.
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Answer Details:
Grade: High School
Subjects: Biology
Topic: Cell growth and development
Keywords:
Tumor, cell, nucleus, chromatin, spheroid, controlled, aerobic, respiration, nucleations, coarse, hypoxic, metastasis.
a. True
b. False
Answer:
Describes ecosystem homeostasis
Explanation: