Topics 1-4 Flashcards
(19 cards)
What is variation
Differences that separate organisms from each other
Example of a variation
Black bear compared to a polar bear
Behavioral adaptation
Include owls hunting at night
Migration of birds from the topics to their nesting sites in the far north
What is a niche
Organisms role in their environment
What are the two main parts of a niche
Habitat-where it lives
What is does interactions in its environment
What is biodiversity
Number of varieties of different organisms
Binary fission
Asexual
Whet cell duplicates it’s contents,the splitting of a single-celled organism into two new organisms approx.equal in size
Spore
Asexual single celled from which an individual offspring develops plants,algae,fungi
Vegetative growth
Asexual the growing tips of roots and stems contain area of rapidly reproducing cells called meristem
Budding
Asexual process in which a bud forms on an organism,grows and eventually breaks away to become a new organism independent of the parent
Zygospores
Sexual
Contain genetic information from two different mating types
Bacterial conjugation
Sexual Direct transfer of genetic material (DNA) from one bacterial cell to another
Plants
Sexual plants have male and female parts to reproduce sexually.through pollination where pollen containing sperm travels to the female cone
Animals
Sexual Fertilization occurs when an egg and sperm cell the female and male gametes join to form a new cell
Continuous variation
For any species is something that gradually changes over a range of time
Ex.-height
-weight
-foot length
Discrete variation
Characteristics that have a definite form with limited number of possibilities
Ex.-gender
- Blood Group
- Eye colour
- Hairline
Dominant
When mixed the dominant trait will show up in the offspring
The dominate is powerful
Recessive
Shows up in offspring only if both parents passed on the genes for the trait
When mixed with genes for a dominant trait a recessive trait doesn’t show up in the offspring
Galapagos Finches
13 in total on Galapagos island
And found 1 more on cocos island
Small ground finch small beak slightly curved so they can pick up seeds from the ground rather than a small tree finch beak different for grabbing insects is easier
