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Science 2nd quarter

Plants alter chemicals in air now? They take nitrogen from atmosphere and help soil in nitrogen fixation.
Some insects survive because of traits that they have when insecticide tries to kill them? Explain why? Insects that survived sprayings passed their resistent gene on to their offspring.
Snowshoe hares have a change in fur color from brown in summer to white in winter. If they live in a warm climate for a long time what will happen? They will probably have brown fur all year long.
Squirrels got sent to the Grand Canyon. Today these animals show a white tail and black belly. their ancestors had different colors. This difference is most likely evidence of speciation due to geographical isolation.
Sex cell is haploid
Body cell is diploid
Describe a gene. Coded instructions for a specific trait.
How will an organism be affected if part of its chromosome is missing? It will lack control of cell processess.
If someone is trying to find out if a molecule is RNA or DNA what should he test for? Thymine
The order of bases along a gene determines the order in which amino acids are put together to form protein
Function of RNA? copies coded message from DNA and carries it to the cytoplasm.
What nucleic acids are in both DNA and RNA? Guanine, adenine, and cytosine
Dna molecule is being chased into RNA molecule. The next base on the DNA sequence is adenine. Which base is next? Uracil
When does a mutation occur? When there is a change in the order of bases.
What must a gamete of the plant carry? Only one allele
A pea plant has white flowers and yellow seeds. what does Mendel's law of independent assortment say about these traits? Inheritance of one trait doesn't affect the other.
In a cross for parents that are pure for contrasting traits only one form of the trait will appear in the next generation. Offspring that are hybrid for this trait will have only the DOMINANT trait in the phenotype. Which mendel law? law of Dominance
tall id D short is d in a plant which GENOTYPE would a short offspring have? dd
if a male dog is homozygous dominate GG and it mates with a homozygous recessive femal gg what will the results of the offspring be? 100% will be heterozygous
Prophase= chromosome are copied
metaphase= chromosomes line up in middle
anaphase= chromosomes pull apart
telophase= nuclear membrane seperate
alleles for different traits are distributed to gametes and offspring independently of one another. what law does this represent? law of independent assortment
a pure dominant traitplant is crossed with a pure recessive plant. The frist generations of offspring are mixed plants. what law of heredity does this represent? law of dominance
u have a group of squirrels that are new to an area. These squirrels are surviving more than any other squirrels in the area. Why? Natural selection- survival of the fittest
Managers have been fighting a group of snails. They are trying to remove evidence by killing eggs and by removing snails. the snails are hurting the area. what type of species is this? Invasive species
what are the beggining and end products of MITOSIS(BODY CELLS)? beginning= cell's genetic material and organelles are copied. End= 2 identical nuclei are produced
What is the correct order of the cell cycle? Interphase, mitosis, and cytokinesis
What are the beginnings and end products of MEIOSIS(SEX CELLS)? B= One diploid cell produces four haploid cells E= The cells are genetically reduced by half and there are four genetically different cells produced
a river caused a population of squirrels to become seperated into two populations. Members of these two pops were later brought together but were not able to breed. This is speciation due to changing landforms
The artic fox goes through two color phases. During winter it is white. During summer it is brown and grey. whats bein described? speciation due to climate
how can beavers, that build dams, hurt the environment? By flooding an area and changing what food some animals can get.
animals that are not to live in an area but do are called what? invasive species
what is the process where animals are able to survive and reproduce in an area is called what? natural Selection
If an animal changes to better fit its environment is what? adaptation
natural selection helps to lead to a new species how? good changes get passed on in living members
when a part of a chromosmome breaks off and it gone forever what happens to the cell? it is missing some genes
Created by: Adry12