The diploid number of chromosomes in one human somatic cell is: TEST IS TIMED!! 23 pairs of chromosomes 23 pairs of alleles two alleles in a genotype 23 chromosomes 46 pairs of chromosomes

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Answer 1

Answer:

Answer:

Human diploid cells have 46 chromosomes

Explanation:

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A mechanism of Darwin's proposed theory is _____.a. natural selection
c. variation
b. over production of offspring
d. all of these

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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.

Pyruvate must first be converted into ____________ before entering the tca cycle. what is the reaction

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Pyruvate must first be converted to acetyl co-enzyme A before entering the TCA cycle.

Reaction

How are tumor cells different from normal cellsa:the tumor is a haploid and the others are diploids
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

Answers

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.

Learn more-

Learn more about a haploid cell during meiosis brainly.com/question/94813
Learn more about how are mitosis and binary fission similar brainly.com/question/6462270
Learn more about a dividing eukaryotic cell that is treated with a drug that inhibits the shortening of spindle microtubules. This will cause the cell division cycle to stop at the ____ stage.brainly.com/question/10767798

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.

An annual plant bears fruit or flowers every year.
a. True
b. False

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This is false.

These are called perennial plants. Annual plants go through their entire life process within a single year and stop existing, meaning they can't produce fruit every year.

- The ability of an ecosystem to maintain a steady equilibrium by responding tointernal and external negative feedback systems describes -

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Answer:

Describes ecosystem homeostasis

Explanation:

Which description best explains Watson and Crick's DNA model? DNA is a single–stranded molecule that has nitrogenous bases toward its exterior. DNA is a double helix made of two strands linked together with hydrogen bonds. DNA is a double helix that contains nitrogenous bases toward its exterior.

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The discoverers of DNA were not JamesD Watson and Francis Crick. They are the first scientist to formulate anaccurate description of the DNA’s (deoxyribonucleic acid) complex ,double-helical structure. They discovered that base pairing nucleotides mustbe; adenine and thymine; and cytosine and guanine. These base pairs are heldtogether by a hydrogen bond, atype of chemical reaction that s easy to breakand easy to reform. The statement is “DNAis a double helix made of two strands linked together with hydrogenbonds.”

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