Life & the Scientific Method
What is the scientific method?
The objective in facts through testing and experimenting.
How does artificial selection lead to changes in populations over time?
Artificial selection leads to changes in the population over time because we pick and choose which specific animal or veggies that will grow bigger and faster and over time that is the one they use the most compared to the one that grows the least.
what is an atomic number?
The number of protons the element contains .
Define the meaning of dipoles
a pair of equal and oppositely charged poles separated by a distance.
What are 4 classes of biomolecules?
proteins, lipids, carbohydrates, and nucleic acids.
Life emerges at the level of ?
The cell
What is natural selection?
Natural selection are individuals that have a better chance at surviving and to reproduce
What is the atomic weight
The number beneath the symbol (mass#)
Define the meaning of polarity?
a separation of charge leading to a molecule having a dipole with a negatively charged end and a positively charged end. Polar molecules must contain one or more polar bonds due to a difference in electronegativity between the bonded atoms.
hydrophilic
Example of an emergent property
Evolution is an example of an emergent property. Humans don't just evolve on their own but we evolve all together.
Are mutations usually beneficial or usually harmful?
How beneficial or harmful mutations are depends on the environment.
What is an ionic bond
Chemical bond that had attractions between opposite charged ions
What is a Hydrogen Bond?
a weak bond characterized by a partially positive hydrogen on one molecule and a partially negative atom such as fluorine, oxygen, or nitrogen on another molecule.
Is the protein interior hydrophilic or hydrophobic
hydrophobic
What are the three domains of life?
The three domains of life are domain bacteria, domain archaea and domain eukarya.
Explain why there is no "goal" involved when natural selection results in evolutionary change of a population.
There is no goal when it comes to natural selection because it really comes to what every species survives , reproduce and adapts the best to what ever their environment is. Evolution is proof that animals past ancestors pass down the good genes and that's why animals evolution is where it is today.
What is covalent bond?
A covalent bond is sharing of electrons to form electron pairs between two different atoms.
What happens when you add acid to a solution?
The ph decreases
What are Structural Isomers?
Molecules that have the same molecular formula (chemical symbols and subscripts indicating the numbers of atoms in a molecule or compound), but different structures.
The independent variable_______________________.
has an effect on the dependent variable.
5 ways forces that cause populations to change their frequencies of traits.
Five ways forces that cause populations to change their frequencies of traits would be natural selection, genetic drift, gene flow, founder effect and relative fitness
What is the octet rule?
The octet rule is when atoms must have eight electron in the valance shell to be complete.
What happens if you add base to a solution?
The ph increases.
What are other kinds of carbohydrates?
Sugars, Starches, Glycogen, Fibers, Chitin