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Biology > Bio Test > Flashcards

Bio Test Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Less specialized cells develop to possess a more distinct form and function

A

Differentiation

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2
Q

How many different types of cells do the human body have?

A

300

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3
Q

Why is cell differentiation important?

A

It forms muscle and nerve cells

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4
Q

Difference between Haploid and Diploid

A

Diploid–2 sets of dNA

Haploid–1 set of DNA

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5
Q

Totipotent stem cells can become….

A

Any cell type

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6
Q

What two things come together to form a zygote?

A

Egg and Sperm

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7
Q

Where can stem cells be obtained?

A

Adults and Embryos

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8
Q

In early embryonic development, continuous cell divisions result in a cell-covered, fluid-filled ball called…

A

the BLASTULA

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9
Q

Once the zygote divides by mitosis to form 2 cells, the developing organism is called….

A

an embryo!

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10
Q

Difference between Mitosis and Meiosis

A

Mitosis divides the cell once and meiosis divides the cell twice

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11
Q

Cell Lysis

A

Destruction of Cells

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12
Q

Fertilization

A

Fusion of an egg and sperm to form a zygote

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13
Q

3rd stage of Meiosis

A

Anaphase I

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14
Q

Which statement is false about Meiosis?

a) Makes Haploid Cells
b) Involved in asexual reproduction
c) Makes Genetically Unique Cells
d) Occurs only at certain times in life

A

B) Involved in asexual reproduction

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15
Q

What separates during Anaphase II of Meiosis

A

Sister Chromatids

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16
Q

How many cycles are in Meiosis

A

2

17
Q

In the devloping embryo, what helps determine how a cell will differentiate?

A

location

18
Q

List the 3 layers of cells that form in the embryo, and what each layer gives rise to in the organism

A

Ectoderm–skin
Endoderm–organs
Mezoderm–muscles bones

19
Q

How are the stem cells classified?

A

ability and potential

20
Q

2 sources of stem cells and one advantage and disadvantage

A

Embryo–easier acces but not a perf match

Adult Stem Cells

21
Q

At which stage of the embryo does cell differentiation begin?

A

Gastrula

22
Q

Is the cell produced by fertilization haploid or diploid?

A

Diploid

23
Q

How many times is DNA replicated before Meiosis?

A

ONce

24
Q

When is the chromosome number reduced by half?

A

Meiosis I

25
Q

How do homologous chromosomes differ from sister chromatids?

A

Homo= not genetically identical

26
Q

Why is an egg larger than sperm?

A

It has to swim

27
Q

If during Metaphase I, all 23 maternal chromosomes lined up on one side of the cell, and so all 23 paternal chromosomes lined up on the other side of the cell, would genetic diversity increase?

A

No it would decrease

28
Q

Where are germ cells located?

A

Testes and Ovaries

Biology (9 decks)

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