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Biology > Sexual Repro N4 > Flashcards

Sexual Repro N4 Flashcards

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1
Q

How many parents does sexual reproduction require?

A

2

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2
Q

What needs to join for fertilisation?

A

Sex cells

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3
Q

What are sex cells called?

A

Gametes

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4
Q

What gametes are male?

A

Sperm

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5
Q

Where is the nucleus in sperm?

A

In the head

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6
Q

Where is the DNA in the sperm

A

Nucleus, in the head

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7
Q

How often do the ovaries produce an egg

A

Every 28 days

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8
Q

Are offsprings all the same?

A

No

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9
Q

What do the ovaries do?

A

Produce eggs

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10
Q

What is the oviduct for?

A

For the embryo to plant in

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11
Q

What happens in the vagina?

A

Sperm are deposited into the female

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12
Q

Whats the sperm duct?

A

Tube connecting the testes to the urethra

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13
Q

What happens in the urethra?

A

Sperm exit the body through this tube

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14
Q

Whats the penis for?

A

To deposit sperm into the female

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15
Q

What happens in the testes?

A

Sperm are made

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16
Q

What is fertilisation?

A

The fusion of the two male and female gametes

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17
Q

How are non identical twins formed?

A

2 egg cells are fertilised, each egg by a different sperm

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18
Q

How are identical twins formed?

A

1 egg fertilised by one sperm then divides into 2 halves

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19
Q

Where does sexual reproduction happens for fish?

A

Outside the body (externally)

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20
Q

Do frogs use external fertilisation?

A

Yes

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21
Q

How long do lambs get milk from their mum for?

A

Around 6 months

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22
Q

How many parents are involved in asexual reproduction?

A

1

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23
Q

Are sex cells produced in asexual reproduction?

A

No

24
Q

Are offsprings identical in asexual reproduction?

A

Yes

25
Q

What can produce asexually?

A

Flowers & sea anenemys

26
Q

How can a wind pollenated plant be identified?

A

Pollen grains are light & petals are dull in colour

27
Q

How an insect pollenated plant be identified?

A

Bright petals, sticky stigma and nectar to attract insects

28
Q

How does pollen travel?

A

By the wind or insects

29
Q

Where does pollen travel from and to?

A

The anther to the stigma of another plant

30
Q

What is selective breeding?

A

Breeding the best plants with favoured traits

31
Q

How can selective breeding benefit us?

A

Can make plants healthier for us

32
Q

What are some methods of selective breeding?

A

Cuttings, layering and clonings

33
Q

How does cutting work?

A

Cutting forms roots in water before being planted into moist soil

34
Q

What do plants need to grow?

A

Water & oxygen

35
Q

Can asexual plants adapt to different environments?

A

No

36
Q

Do sexual reproductive things always have good features?

A

No

37
Q

Where is the information to build an organism stored in a cell?

A

Nucleus

38
Q

What does variation mean?

A

Difference between individuals of the same species

39
Q

Children inherit character from….?

A

Their parents

40
Q

Dominant alleles overrule…?

A

Recessive alleles

41
Q

What is a hereditary disease?

A

A disease you inherit that you cannot catch

42
Q

How do we gain water?

A

Drinking, eating and chemical reactions

43
Q

How can we lose liquids?

A

Exhaling, urination, sweating, crying

44
Q

What happens in kidneys failure

A

The body’s internal water balance will become disturbed

45
Q

Kidney transplant is when…?

A

Replacement kidney is transplanted

46
Q

What are pros of kidney transplant?

A

Person can lead a normal life, no machines needed

47
Q

What are the pros of dialysis?

A

Purifies blood, cannot be rejected

48
Q

What are the cons of kidney transplant?

A

Might reject, healthy kidneys are low in supply

49
Q

What are the cons of dialysis?

A

Not portable, expensive, patient cannot live freely, takes a long time to

50
Q

What does homeostasis do?

A

Keep internal temperature steady

51
Q

External factors vary according to?

A

Weather, food and water intake

52
Q

Internal factors vary according to?

A

Temperature and glucose levels

53
Q

How can our blood sugar levels increase?

A

Drinking and eating

54
Q

What happens when our blood sugar levels increase?

A

Body releases insulin

55
Q

What happens when our blood sugar levels decrease?

A

Pancreas releases glucagon

56
Q

How can blood sugar levels decrease?

A

By doing exercise and respiring

Biology (21 decks)

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