Stability In Ecosystems
What is a carrying capacity?
The amount of organisms that an ecosystem can hold
Transcription vs Translation?
the process of making an RNA copy of a gene's DNA sequence
the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis
Which of the cell organelles does not contain DNA?
Lysosomes
Main sources of genetic variation?
Two main sources of genetic variation are random mutations and genetic recombination.
What is speciation
When one species makes 2 different species
Growth of Organisms without any stop for a short burst.
Exponential Growth
What is a codon?
a sequence of three nucleotides
Cellulose
What is crossing over?
The exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).
Why does speciation happen?
Geographic and Environmental differences
What effect does an invasive species have on the carrying capacity?
Carrying Capacity Decreased
What information is coded into DNA?
Genetic Information
Which of the cell organelles regulates the entry and exit of molecules to and from the cell?
Cell Membrane
Why is genetic variation important?
Without genetic variation, some of the basic mechanisms of evolution can’t operate and organisms will fail to adapt and eventually die. Genetic variation allows natural selection to occur, and this increases the ability of organisms to survive changes in their environment and reproduce.
Darwin's example of speciation
Galapagos finches
When two or more species fight for resources?
Competition
When do cells duplicate their DNA?
During Mitosis
What type of cells do not have a Nucleus, Lysosome, and an Endoplasmic Reticulum.
Prokaryotic Cells
What is the passing of physical characteristics from parent to offspring called?
Hereditary
What kind of process is speciation?
How do humans negatively affect ecosystems?
Pollution, Fossil Fuels
How many strands make up a DNA double helix?
2 Complimentary Strands
Which of the cell organelles is present in plant cells and absent in animal cells?
Chloroplasts & Cell Wall
What are heterozygous allelles?
One dominant and one recessive allele.
How long does speciation take?
Over 2 million years