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Mastery test holy Infant College > Science 7 mastery > Flashcards

Science 7 mastery Flashcards

1
Q

What is the function of the eyepiece in a microscope?

A

To magnify the image of the specimen.

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2
Q

Which part of the microscope controls the amount of light that reaches the specimen?

A

The diaphragm.

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3
Q

True or False: The coarse adjustment knob is used for precise focusing.

A

False.

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4
Q

What is the purpose of the objective lenses?

A

To provide different levels of magnification.

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5
Q

Fill in the blank: The __________ is the part of the microscope that supports the slide.

A

stage.

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6
Q

What is mitosis?

A

The process of cell division that results in two identical daughter cells.

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7
Q

List the phases of mitosis in order.

A

Prophase, Metaphase, Anaphase, Telophase.

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8
Q

What is the main purpose of meiosis?

A

To produce gametes with half the number of chromosomes.

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9
Q

True or False: Meiosis results in four genetically identical cells.

A

False.

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10
Q

What is the outcome of meiosis in terms of chromosome number?

A

It reduces the chromosome number by half.

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11
Q

What type of reproduction involves two parents?

A

Sexual reproduction.

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12
Q

Fill in the blank: Asexual reproduction produces offspring that are __________ to the parent.

A

genetically identical.

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13
Q

Which type of reproduction allows for greater genetic diversity?

A

Sexual reproduction.

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14
Q

What is binary fission?

A

A form of asexual reproduction in which a single organism divides into two parts.

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15
Q

True or False: Budding is a form of sexual reproduction.

A

False.

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16
Q

Which reproductive process involves the fusion of gametes?

A

Fertilization.

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17
Q

What is crossing over?

A

The exchange of genetic material between homologous chromosomes during meiosis.

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18
Q

What are homologous chromosomes?

A

Chromosomes that are similar in shape, size, and genetic content.

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19
Q

Fill in the blank: In asexual reproduction, the offspring are produced from a __________ parent.

A

single.

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20
Q

What is the role of spindle fibers during mitosis?

A

To separate the chromosomes during cell division.

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21
Q

Name one advantage of asexual reproduction.

A

It allows for rapid population growth.

22
Q

What occurs during prophase of mitosis?

A

Chromosomes condense, and the nuclear envelope breaks down.

23
Q

What is the function of the cell membrane during cell division?

A

To ensure that the contents of the cell remain intact during division.

24
Q

True or False: The end result of meiosis is two haploid cells.

A

False.

25
Q

What is the term for the initial cell that undergoes meiosis?

A

Germ cell.

26
Q

Fill in the blank: A __________ is a reproductive cell that can unite with another to form a new organism.

A

gamete.

27
Q

What is the significance of telophase in mitosis?

A

It marks the end of cell division and the reformation of the nuclear envelope.

28
Q

What happens during anaphase?

A

Sister chromatids are pulled apart to opposite poles of the cell.

29
Q

What is the primary purpose of sexual reproduction?

A

To increase genetic variation in a population.

30
Q

True or False: Mitosis occurs in somatic cells.

A

True.

31
Q

What is a zygote?

A

The fertilized egg that results from the fusion of two gametes.

32
Q

What is the difference between haploid and diploid cells?

A

Haploid cells have one set of chromosomes, while diploid cells have two sets.

33
Q

Fill in the blank: During __________, homologous chromosomes align at the cell’s equator.

A

metaphase I.

34
Q

What is sexual selection?

A

A natural selection process where certain traits increase mating success.

35
Q

What is the role of the centriole during cell division?

A

To organize the spindle fibers.

36
Q

True or False: Asexual reproduction can occur in multicellular organisms.

A

True.

37
Q

What is regeneration in terms of asexual reproduction?

A

The ability of an organism to regrow lost body parts.

38
Q

What are gametes?

A

Reproductive cells (sperm and eggs) that unite during fertilization.

39
Q

Fill in the blank: The __________ is a structure that holds together sister chromatids.

A

centromere.

40
Q

What is the main difference between mitosis and meiosis?

A

Mitosis produces two identical cells, while meiosis produces four genetically diverse cells.

41
Q

True or False: Asexual reproduction requires the exchange of genetic material.

A

False.

42
Q

What is a clone?

A

An organism that is genetically identical to its parent.

43
Q

Fill in the blank: The __________ phase is when the cell prepares for division by replicating its DNA.

A

S phase.

44
Q

What is independent assortment?

A

The random distribution of maternal and paternal chromosomes during meiosis.

45
Q

What is the role of cytokinesis?

A

To divide the cytoplasm and organelles between the two daughter cells.

46
Q

What type of organism primarily reproduces asexually?

A

Bacteria.

47
Q

Fill in the blank: In sexual reproduction, offspring inherit traits from __________ parents.

A

two.

48
Q

What is the primary advantage of sexual reproduction?

A

Increased genetic variation.

49
Q

What is the end result of mitosis in terms of cell number?

A

Two identical daughter cells.

50
Q

True or False: Mitosis includes two rounds of cell division.

A

False.

Mastery test holy Infant College (6 decks)

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