species and their environment Flashcards
what do animals compete for
food, territory and mates
what is adpatation
features or characteristics of living organisms that help them survive or suit to the environment
what kind of characteristics would a animal living in a warm climate have
thin fur, thin layer of fat, depends on the colour of the environment
what kind of characteristics would a animal living in a cold climate have
thick fur, thick layer and white fur for camouflage
what is the Darwin theory
- survival for the fittest
- features to adapt towards the environment will be naturally selected
- genes will be passed down to the next generation
what is variation
difference in features and characteristics
what are inherited traits
traits that are passed down from the parents to the offsprings
what are some examples of inherited traits
eye colour, hair colour and blood type
what are environmental traits
traits that are influenced by environment
what are some examples of environmental traits
height and weight
how many chromosomes do you receive
23 chromosomes from the father and 23 chromosomes from the mother
what happens if you have an extra chromosome
you get down syndrome
what is a chromosome
coiled DNA
what is a DNA
double helix
what is a gene
one section of the DNA
what do the plants compete for
sunlight, water, space and minerals
what is a species
a set of animals or plants in which the members have similar characteristics and can breed with each other.
what is a phenotype
observable traits of a person
who determines the sex of the baby
the father determines the sex of the baby since the mother can only provide the x chromosome while the father can provide both x and y chromosomes.
how do you inherit characteristics
you inherit characteristics from your parents through genetic materials stored in the nucleus of your cell called the DNA
what are fossils
the remains or traces of plant that lived many years ago
explain why humans only have 46 chromosomes
egg and sperm cells each contain 23 chromosomes. They only have one copy of each chromosome. During fertilisation, the egg and sperm cells join together. When the nuclei join, their chromosomes pair up, producing an embryo with 46 chromosomes.
what is a genotype
the genetic information about a person
what is a dominant allele
the dominant allele determines what the offsprings will look like
