Section 1
When the environment selects which organisms will survive long enough to reproduce.
What is natural selection?
Asexual reproduction involves ____ parent(s).
What is one?
Individuals that cross two _______ parents that differ in a trait are called hybrids.
What is purebred?
Every member of a species has disappeared from the planet.
What is extinction?
DNA is a _______ for multicellular organisms.
What is a blueprint?
The role of an organism within the ecosystem.
What is a niche?
During ______ ______, a cell splits in two.
What is binary fission?
The structure of DNA.
What is a double helix?
Selecting and breeding individuals with desired traits so that their offspring will have those traits.
What is artificial selection?
This Austrian monk traced patterns of inheritance in pea plants.
Who is Gregor Mendel?
What is an ecosystem?
Two gametes join to become a cell called a _____
What is a zygote?
The process that produces two new cells with the same number of chromosomes.
What is mitosis?
Any technology that alters an organism's DNA.
What is genetic engineering?
Gene variations carried on chromosomes.
What are alleles?
Variation within a species (not diversity).
What is variability?
Pollen is found in this part of a plant.
What is the stamen?
Chromosomes are located here.
What is the cell nucleus?
Maintaining the populations of wild organisms in their ecosystems.
What is in-situ conservation?
As an example of _______, symbiosis is extreme.
What is interdependence?
This is sometimes used in Linnaeus' classification system between phylum and class.
What is a subphylum?
Egg cells are also known as _____________
What are ova?
Each rung of the DNA ladder is made of two of these four chemicals.
What are adenine, thymine, cytosine and guanine (A, T, C and G)?
In _______ ___________, sperm and eggs are harvested, placed in a Petri dish, fertilized and inserted into organisms.
What is in-vitro fertilization?
These three scientists were crucial in discovering the structure of DNA.
Who are James Watson, Francis Crick and Rosalind Franklin?