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7.55 Natural Selection Mechanisms and Adaptation Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.55 Natural Selection Mechanisms and Adaptation. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Natural Selection Mechanisms and Adaptation - Which scenario best illustrates natural selection leading to increased frequency of a trait? (NGSS MS‑LS4‑4)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 7

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

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Below are sample questions representative of the exercises included on this worksheet and related 7.55 Natural Selection Mechanisms and Adaptation skill assessments:

Problem 1Difficulty: Mastery

Researchers compare two inherited forms of growth height in prairie grasses: shorter growth form and taller growth form. The environment is one where large grazing animals feed often. Data from one generation: - shorter growth form: 40 adults produced 66 surviving offspring - taller growth form: 40 adults produced 28 surviving offspring Which interpretation links the offspring data to selection in this environment?

ANatural selection is likely favoring shorter growth form, because that inherited trait is linked to more surviving offspring in this environment.

BThe data show genetic drift only, because the two trait groups had the same number of starting adults.

CThe data show that individual prairie grasses with taller growth form will immediately change into individuals with shorter growth form.

DThe data prove that growth height is controlled only by the environment and is not inherited.

Solution & Explanation:The starting adult counts are equal, but the shorter growth form group produced more surviving offspring under the stated pressure. That pattern supports natural selection favoring an inherited adaptation; it does not show instant individual change or random drift alone.

Problem 2Difficulty: Mastery

Researchers compare two inherited forms of shell strength in mussels: stronger shells and thinner shells. The environment is one where crab predators become more common. Data from one generation:,,Science - stronger shells: 49 adults produced 65 surviving offspring,,Science - thinner shells: 49 adults produced 37 surviving offspring,,Science "Which interpretation links the offspring data to selection in this environment?,A. The data show that individual mussels with thinner shells will immediately change into individuals with stronger shells. | B. Natural selection is likely favoring stronger shells

Abecause that inherited trait is linked to more surviving offspring in this environment.

BThe data prove that shell strength is controlled only by the environment and is not inherited.

CThe data show genetic drift only

Solution & Explanation:but the stronger shells group produced more surviving offspring under the stated pressure. That pattern supports natural selection favoring an inherited adaptation; it does not show instant individual change or random drift alone.,NO,,,,,online_practice_skill_page,practice,Natural Selection Mechanisms and Adaptation practice questions for Grade 7 science,Grade 7 science natural selection mechanisms and adaptation online practice | SCI.7.55 practice questions | biological evolution review questions | natural selection mechanisms and adaptation with explanations,Grade 7 Science Practice: Natural Selection Mechanisms and Adaptation,Natural Selection Mechanisms and Adaptation,Natural Selection Mechanisms and Adaptation | Grade 7 Science Practice,Practice natural selection mechanisms and adaptation in Grade 7 science with online questions

Problem 3Difficulty: Mastery

Researchers compare two inherited forms of bark thickness in pine trees: thicker bark and thin bark. The environment is one where small ground fires occur regularly. Data from one generation: - thicker bark: 48 adults produced 64 surviving offspring - thin bark: 48 adults produced 36 surviving offspring Which interpretation links the offspring data to selection in this environment?

AThe data show genetic drift only, because the two trait groups had the same number of starting adults.

BThe data show that individual pine trees with thin bark will immediately change into individuals with thicker bark.

CNatural selection is likely favoring thicker bark, because that inherited trait is linked to more surviving offspring in this environment.

DThe data prove that bark thickness is controlled only by the environment and is not inherited.

Solution & Explanation:The starting adult counts are equal, but the thicker bark group produced more surviving offspring under the stated pressure. That pattern supports natural selection favoring an inherited adaptation; it does not show instant individual change or random drift alone.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 7 Science students. It aligns with educational standard SCI.7.55 (Grade 7 science practice focused on natural selection mechanisms and adaptation.).