Topic 10: Biodiversity

Question 1

classification

Answer 1

the organisation of living organisms into groups

Question 2

features of classification

Answer 2

process is not random

based on number of accepted principles

Question 3

species

Answer 3

basic unit of classification

Question 4

the concept of species

Answer 4

members of same:
capable of breeding to produce living fertile offspring
- any of the genes can be combined with any other

Question 5

the binomial system

Answer 5

swedish botanist - Linnaeus

organisms identified by 2 names

Question 6

features of binomial system

Answer 6

universal system based on Latin & Greek names
first name = generic name = genus = surname
second name = specific name = species = first name
- not shared by any other species in the genus

Question 7

rules of binomial system:

Answer 7

names printed italics
handwritten = underlined
1st letter of genus = capital but specific = lower
if specific name unknown = sp e.g Felix sp

Question 8

binomial system

Answer 8

constantly changing

current names reflect present nature of scientific knowledge

Question 9

reasoning behind courtship behaviour

Answer 9

members of same species =similar
resembles one another physically and biochemically
- helps to distinguish members of own species from others = same for behaviour

behaviour of same species more alike than different
individuals can recognise members of same species by behaviour
behaviour genetically determined

Question 10

reasoning behind courtship behaviour - 2

Answer 10

no one is immortal
reproduction only way where species survives over time
females of most species only produce eggs at specific times
therefore important to ensure mating is successful &offspring have max chance of survival

Question 11

courtship behaviour helps achieve …..

Answer 11

recognise members of own species
- ensure mating only takes place between members of same species b/c only same members - fertile offspring

identify mate of capable of breeding
- both partners need to be sexually active , fertile and receptive to mating

form a pair bond
- that will lead to successful mating & raising offspring

synchronise mating
- takes place where max chance of sperm and egg meeting

become able to breed
-brings member of opp sex into physiological state- allows breeding to occur

Question 12

why and how courtship works?

Answer 12

females undergo cycle of sexual activity in where they can concieve
often only recpetive to mating around time they produce eggs
courtship used (m) to determine whether f is at receptive stage
if appr behavioural response given = courtship