Download Document

10C 20 Poutū-te-Rangi 2017
What we will do
What we will learn
Quick quiz and preliminaries
How to start well
For a species, advantages and
disadvantages of sexual and asexual
repro
Why most living things reproduce
sexually
Examine how both sexes make and
contribute the GAMETES:
4623
23rd pair: XX or XY
Labelled parts.
What a gamete is, how both
sexes make them and how they
unite.
If time, some HRT on the HW books
How to make great use of time.
HW item
Skills practiced
HW booklet pages on skeletal
system, muscles and joints, blood
and heart, circulatory system
Pages 1 - 8
Due Thursday 16th of March 2017
Time management
Knowledge of three systems in
the body
HW booklet pages 9 – 18:
circulatory, breathing and
digestive systems.
Due Tuesday 21st of March 2017
Time management
Knowledge of three systems in
the body
Asexual Reproduction
Asexual Reproduction
Asexual reproduction is the production of the next generation but only using one parent.
Examples include: plant cuttings, plant “suckers”, stick insects and aphids (some
generations only)
Asexual Reproduction
Asexual reproduction is the production of the next generation but only using one parent.
Examples include: plant cuttings, plant “suckers”, stick insects and aphids (some
generations only)
Advantages and Disadvantages of Asexual Reproduction
ADVANTAGES
DISADVANTAGES
It is a very efficient way of making lots of
the next generation
It only requires one parent – this is easier if
the species is solitary – e.g. tiger
ALL the identical organisms are vulnerable
to the same diseases as each other
Asexual Reproduction
Asexual reproduction is the production of the next generation but only using one parent.
Examples include: plant cuttings, plant “suckers”, stick insects and aphids (some
generations only)
Advantages and Disadvantages of Asexual Reproduction
ADVANTAGES
DISADVANTAGES
It is a very efficient way of making lots of
the next generation
ALL the identical organisms are vulnerable
to the same diseases as each other
It only requires one parent – this is easier if
the species is solitary – e.g. tiger
Sexual Reproduction is the production of the next generation using genetic mixing from
two parents.
Asexual Reproduction
Asexual reproduction is the production of the next generation but only using one parent.
Examples include: plant cuttings, plant “suckers”, stick insects and aphids (some
generations only)
Advantages and Disadvantages of Asexual Reproduction
ADVANTAGES
DISADVANTAGES
It is a very efficient way of making lots of
the next generation
ALL the identical organisms are vulnerable
to the same diseases as each other
It only requires one parent – this is easier if
the species is solitary – e.g. tiger
Sexual Reproduction is the production of the next generation using genetic mixing from
two parents.
Advantages and Disadvantages of Sexual Reproduction
ADVANTAGES
VARIATION: Every individual is a little bit
different from the others. This makes it
harder to wipe out a whole species
DISADVANTAGES
It uses lots more resources: food, energy,
time
It needs two parents. This is difficult for
some species: e.g. Angler Fish