What is natural selection?
Bio Staar Review

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Science
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9th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Natural selection is the process by which organisms that are better adapted to their environment tend to survive and produce more offspring. It leads to changes in inherited traits in a population over time.
2.
FLASHCARD QUESTION
Front
What are inherited traits?
Back
Inherited traits are characteristics that are passed from parents to offspring through genes. Examples include eye color, height, and certain behaviors.
3.
FLASHCARD QUESTION
Front
What is an allele?
Back
An allele is a variant form of a gene that can result in different traits. For example, a gene for flower color may have a red allele and a white allele.
4.
FLASHCARD QUESTION
Front
What does it mean if an allele increases in a population?
Back
If an allele increases in a population, it means that the trait associated with that allele is becoming more common, often due to natural selection favoring individuals with that trait.
5.
FLASHCARD QUESTION
Front
What is a hypertonic solution?
Back
A hypertonic solution is one that has a higher concentration of solutes compared to another solution, causing cells in that solution to lose water and shrink.
6.
FLASHCARD QUESTION
Front
What is the cell cycle?
Back
The cell cycle is the series of phases that a cell goes through to grow and divide. It includes phases such as G1, S (synthesis), G2, and M (mitosis).
7.
FLASHCARD QUESTION
Front
What happens during the S phase of the cell cycle?
Back
During the S phase, DNA replication occurs, resulting in the duplication of the cell's genetic material.
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