Biology Chapter 7 Section 1 and 2 - the cell

who contributed to cell theory by discovering and naming cells?

• Virchow

• Hooke

• Janssen

• Leeuwenhoek

• Schween

Answer explanation

Robert Hooke contributed to cell theory by discovering and naming cells in 1665. He observed cork under a microscope and coined the term 'cells' to describe the small, box-like structures he saw.

Who contributed to cell theory by establishing that all plants are composed of cells

• Schleiden

• Schwann

• Hooke

• Janssen

Answer explanation

Matthias Schleiden contributed to cell theory by stating that all plants are made up of cells, which was a key element in the development of this fundamental biological concept.

Who was the first person to observe and describe living microorganisms

• Hooke

• Schwann

• Virchow

• Leeuwenhoek

• Janssen

Answer explanation

The first person to observe and describe living microorganisms was Antonie van Leeuwenhoek. He used a microscope he designed to examine various substances, leading to the discovery of bacteria and protozoa.

Who launched the field of cellular pathology

• Leeuwenhoek

• Schwann

• Plato

• Hooke

• Virchow

Answer explanation

The field of cellular pathology was launched by Rudolf Virchow, who is known for his contributions to understanding disease at the cellular level, emphasizing the role of cells in health and disease.

Who proposed that animals like plants are composed of cells?

• Rudolf Virchow

• Charles Darwin

• Gregor Mendel

• Theodor Schwann

Answer explanation

Theodor Schwann proposed that all living organisms, including animals, are composed of cells, contributing to the cell theory. This was a significant advancement in biology, paralleling the understanding of plant structure.

Who invented the single lens microscope?

• Darwin

• Hooke

• Janssen

• Virchow

• Schwann

Answer explanation

The single lens microscope was invented by Hans Janssen and his son Zacharias in the late 16th century. They were among the first to use a single convex lens to magnify objects, making Janssen the correct answer.

What are the 3 parts of the cell theory

• All cell are composed of carbon and hydrogen

• All living organisms are composed of one or more cells

• only animals, plants, and rocks are composed of cells

• cells are the basic unit of structure and organization of cells

• cells arise from only from previously existing cells with cells passing copies of their genetic code on to their daughter cells

Answer explanation

The cell theory states that all living organisms are made of one or more cells, cells are the basic unit of structure and organization, and cells arise from pre-existing cells, passing genetic information to daughter cells.

What are the 2 basic types of microscopes?

• Digital microscope and scanning probe microscope

• Light microscope and electron microscope

• Compound microscope and stereo microscope

• Fluorescence microscope and phase-contrast microscope

Answer explanation

The two basic types of microscopes are the light microscope, which uses visible light to magnify samples, and the electron microscope, which uses electron beams for higher resolution imaging.

All cells share 3 basic functions. What are they?

• produce chlorophyll

• have cytoplasm

• have a cell wall

• have a nucleus

• have a cell membrane

Answer explanation

All cells have cytoplasm, a cell membrane, and a nucleus, which are essential for their structure and function. Chlorophyll and cell walls are specific to certain cell types, not universal to all cells.

Tags

NGSS.MS-LS1-2

Explain the difference between magnification and resolution?

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Answer explanation

Magnification refers to how much larger an object appears, while resolution is the ability to distinguish between two closely spaced objects. High resolution allows for clearer details, regardless of magnification level.