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N5 Biology > 2.3 Reproduction > Flashcards

2.3 Reproduction Flashcards

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1
Q

How many chromosomes does a human body cell have?

A

46, this is a diploid number of chromosomes.

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2
Q

What types of cells have a haploid number of chromosomes?

A

Gametes, they have half the number of chromosomes (23).

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3
Q

What types of gametes are present in animals?

A

Sperm cells and egg cells.

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4
Q

What organ produces and holds sperm cells?

A

Testes.

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5
Q

Which organ produces and holds egg cells?

A

Ovaries.

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6
Q

What types of gametes are present in plants?

A

Pollen cells and ovule cells.

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7
Q

Where are pollen cells produced in plants?

A

At the anther.

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8
Q

Where are ovule cells produced in plants?

A

In the ovary.

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9
Q

What is fertilisation?

A

Fertilisation is the fusion of the nuclei of the two haploid gametes to produce a diploid zygote, which decides to form an embryo.

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10
Q

What is the urethra?

A

A tube from which sperm leaves the body.

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11
Q

What is the scrotum?

A

Skin that holds the testicles outside the body.

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12
Q

What is the sperm duct?

A

A tube sperm travel along on the way to the urethra.

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13
Q

What are the glands?

A

They add fluid to nourish the sperm.

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14
Q

What is the uterus?

A

The place where a foetus will develop.

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15
Q

What is the oviduct (fallopian tube)?

A

A tube which the egg cell will travel along on its way to the uterus.

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16
Q

What is the cervix?

A

A narrow opening between the vagina and uterus.

17
Q

What is the lining of the uterus?

A

The walls of the uterus which will thicken every month ready to receive a fertilised egg.

18
Q

What is the vagina?

A

The place where sperm will enter the body.

19
Q

What is the stamen?

A

The male sex organ - made of the filament and the anther.

20
Q

What is the anther?

A

The part of the male sex organ which makes pollen.

21
Q

What is the filament?

A

A thin stalk that supports the anther.

22
Q

What is the carpel?

A

The female sex organ - made of the stigma, the style, and the ovary.

23
Q

What is the stigma?

A

The top of the female sex organ which collects pollen.

24
Q

What is the style?

A

The part which connects the stigma to the ovary.

25
Q

What is the ovule?

A

Its found inside the ovary; contains the egg cell.

26
Q

What is the pollen tube?

A

A tube that grows out of the pollen grain and into the stigma: carries the pollen down to the egg cell.

N5 Biology (19 decks)

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