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2nd Quarter Science
| Question | Answer |
|---|---|
| What effect do animals have on the environment? | They release carbon dioxide into the atmosphere. |
| A puppy chews on objects other than food. This behavior is _____________ . | An inherited innate behavior. |
| Plants alter the chemicals in the air how? | They take the nitrogen from the atmosphere and help the soil in nitrogen fixation. |
| A change in ocean current causes the climate on an island to become drier. As a result, the grasses that cover the island change from dark green to light brown. Over time, how might a species of green toads that hide in the grasses and are subjected to pr | Their coloration will change to brown. |
| What effective insecticide is used on a population of insects, most of the insects are killed. However, a few may survive due to genes that make them resistant to the insecticide. What is the BEST explanation of why this occurs? | Insects that survived sprayings passed their resistant genes to their offspring. |
| Snowshoe hares experience a change in fur color from brown im the summer to white in the winter. Which statement best describes how the appearance of a particular snowshoe hare may change after it lives in a warm climate year-round, for many generations? | It would have brown fur all year long. |
| Less thhan ten thousand years ago, enviromental changes seperated some individuals of a squirrel population to one side of the Grand Canyon, Today, these squirrels now show a white tail and black belly. Their ancestors exhibited a gray tail and white bell | Is evidence of speciation due to geographical isolation. |
| The sprem cell (gametes) of a squirrel have 20 chromosomes. How many are found in a body cell of the same animal. | 40 Chromosomes |
| How will an organism be affected if part of its chromosome is missing? | The organism will lack necessary information to control cell processed. |
| If a scientist is trying to decide if a molecule is RNA or DNA, for what should he test? | Thymine |
| The order of bases along a gene determines the order in which... | Amino acids are put together to form a protein. |
| What is the function of RNA? | Copy the coded message from the DNA and carry it into the cytoplasm. |
| What nucleic acids are both present in DNA and RNA? | Guanine and Adenine |
| A DNA molecule is being changed into a RNA molecule. The next base to be transcribed on the DNA sequence is adenine. Which base will be the complement in the RNA molecule? | Uracil |
| When does a mutation occur? | When there is a change in the order of the bases in an organism's DNA. |
| A pea plant has alleles for green and yellow seed colors. According to Mendel's law of segregation of characteristics, 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 sat about these traits? | Inheritance of one trait does not affect the other. |
| In a cross of parents that are pure for contrastiong traits, only one form of the other trait will appear in the nest generation. Offspring that are hybrid for a trait will have only the dominant trait in the phenotype. This is an example of which of Mend | Law of Dominance. |
| In a plant, tall (D) is the dominant allele. Short (d) is the recessive allele. Which GENOTYPE would a short offspring have? | dd |
| If a male dog is homozygous dominate (GG) and it mates with a homozygous recessive female (gg), what will the results of the offspring be? | It will be heterozygous (Gg) |
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PinkSugar(:
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