Characteristics of Life
Name two different characteristics of life.
Reproduction, Adaptability, Response to Stimuli, Energy Use, Homeostasis, Organized by Cells, Grow and Develop
____ reproduction requires two parents and ______ reproduction requires one parent.
Sexual/ asexual
What is a phenotype?
Physical characteristic
What is natural selection?
Organisms that are best adapted to an environment will survive and reproduce more than others.
What is LUCA?
Last Universal Common Ancestor
What does RAREHOG stand for? (List them all)
Reproduction, Adaptability, Response to Stimuli, Energy Use, Homeostasis, Organized by Cells, Grow and Develop
In sexual reproduction, the parent(s) give ____% of their DNA to their offspring and in asexual reproduction, the parents give __% of their DNA to their offspring.
50% / 100%
What is a genotype?
The combination of alleles
A black moth and a white moth are hanging out on a black tree. A hungry bird swoops down and eats one of the moths! Which moth was most likely eaten? Why?
The white moth because it did not blend into its surroundings. This is natural selection.
The fossil record shows that...
Different organisms have lived on Earth during different periods of the planet's history.
Which characteristic of life best explains why your arms and legs get longer and stronger as you get older?
Grow and develop
Sexual reproduction
What is the difference between homozygous and heterozygous?
Homozygous dominant have two of the same alleles and heterozygous have two different alleles.
Give an example of natural selection. (Not the moths)
...
Who proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor?
Give an example of response to stimuli
...
What is one disadvantage of asexual reproduction?
...
Freckles are dominant (F) and no freckles is recessive (f). What is a possible genotype(s) for someone with freckles?
FF or Ff
What four things do organisms tend to compete for?
Food, water, space, and mates
What is the advantage of finches having different shaped beaks?
Being able to eat the food that is readily available in their environment
What does it mean to maintain homeostasis?
Maintain a balanced internal environment
What is one advantage of sexual and one advantage of asexual reproduction?
...
In a certain species of pine trees, long needles (L) are dominant to short needles (l). Both parents are heterozygous for this trait. What is the probability of an offspring having short needles? (HINT: make a Punnett square)
25%
A population of grasshoppers in the Kansas prairie has two color phenotypes- green and brown. Typically, the prairie receives adequate water to maintain healthy, green grass. Assume a bird that eats grasshoppers moves into the prairie. How will this affect natural selection of the grasshoppers?
The bird will eat the brown grasshoppers. Over time, there will not be any more brown grasshoppers.
Fossil record, Vestigial organs, Homologous body structures, Biochemical evidence, Embryology