Diversity of Reproductive Strategies in some animals

Question 1

Reproductive strategies (2)

Answer 1

> r-strategy

> k-strategy

Question 2

r-strategy

Answer 2

Spend lots of energy making offspring, and less caring for them

Question 3

k-strategy

Answer 3

Produce fewer offspring, and spend lots of energy on caring for them.

Question 4

Survivorship curves

Answer 4

Illustrates the number of organisms that survive at different stages of their lifespan

Question 5

Reproductive strategies (6)

Answer 5

> Courtship
> External vs Internal fertilization
> Ovipary, Ovovipary and Vivipary
> Amniotic egg
> Precocial and Altricial development
> Parental care

Question 6

Purpose of Courtship (3)

Answer 6

> Ensures both are ready for mating
Helps identify partners of the same species
Choose suitable partner

Question 7

Kinds of Courtship (4)

Answer 7

> Visual stimuli
Sound stimuli
Chemical stimuli
Physical movements

Question 8

External fertilization (3)

Answer 8

• Takes place outside the female’s body.
• Many offspring created
• No energy on caring for the young

Question 9

Internal fertilization

Answer 9

• Inside the female’s body

Question 10

Ovipary

Answer 10

When the animals embryo develops in an egg outside the female’s body

Question 11

Oviparous aquatic

Answer 11

Fertilisation takes place externally in water. Developing embryo is surrounded by a jelly-like layer

Question 12

Oviparous terrestrial

Answer 12

Fertilisation takes place internally. The embryo develops in an egg

Question 13

Ovovivipary

Answer 13

The embryo is surrounded by a thin, membranous shell inside the female’s body

Question 14

Vivipary

Answer 14

The fertilized egg develops into an embryo without the protection of a shell