Biology 1001 Dr. Nita Exam 2 LSU
2025/2026 Exam Questions and Verified
Answers | Already Graded A+
cell theory - 🧠ANSWER ✔✔1. Every organism is made up of one more
cells.
2. The smallest organisms are single cells, and cells are the functional units
of multicellular organisms.
3. All cells arise from preexisting cells.
Robert Hooke - 🧠ANSWER ✔✔- primitive light microscope
- viewed very thin piece of cork
Anton van Leeuwenhoek - 🧠ANSWER ✔✔- built his own microscope
- able to view living cells
,light microscopes - 🧠ANSWER ✔✔- use lenses made of glass or quartz to
bend and focus light
- have much higher resolving power
- structures inside living cells can be visualized
electron microscopes - 🧠ANSWER ✔✔- high resolution
- use beams of electrons focused by magnetic fields to resolve images
- transmission electron microscopes pass electrons through thin specimen
- scanning electron microscopes bounce electrons off specimens that are
dry and hard
Eukaryotic cells - 🧠ANSWER ✔✔- genetic material contained within
membrane-enclosed structures
- complex and make up bodies of animals, plants, fungi, and protists
Prokaryotic cells - 🧠ANSWER ✔✔- do not have a nucleus
- single cells of bacteria and archaea and simplest forms of life
cells are small - 🧠ANSWER ✔✔range in size from about 1 to 100
micrometers in diameter
, cells share common features - 🧠ANSWER ✔✔descended from ancestor
that arose about 3.5 billion years ago
Cells are so small, so they can ________ _________ and ______ with their
________ ___________. - 🧠ANSWER ✔✔exchange nutrients
wastes
external environment
diffusion - 🧠ANSWER ✔✔- slow process by which molecules dissolved in
fluids move
- all parts of cell must remain close to external environment to have access
to nutrients and be able to get rid of wastes
plasma membrane - 🧠ANSWER ✔✔- each cell surrounded by thin
membrane
- encloses cell and allows interaction between cell and its environment
- consists of proteins embedded in bilayer of phospholipids
- two types of proteins: channel and receptor
channel proteins - 🧠ANSWER ✔✔allow specific molecules to pass into or
out of cell
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
2025/2026 Exam Questions and Verified
Answers | Already Graded A+
cell theory - 🧠ANSWER ✔✔1. Every organism is made up of one more
cells.
2. The smallest organisms are single cells, and cells are the functional units
of multicellular organisms.
3. All cells arise from preexisting cells.
Robert Hooke - 🧠ANSWER ✔✔- primitive light microscope
- viewed very thin piece of cork
Anton van Leeuwenhoek - 🧠ANSWER ✔✔- built his own microscope
- able to view living cells
,light microscopes - 🧠ANSWER ✔✔- use lenses made of glass or quartz to
bend and focus light
- have much higher resolving power
- structures inside living cells can be visualized
electron microscopes - 🧠ANSWER ✔✔- high resolution
- use beams of electrons focused by magnetic fields to resolve images
- transmission electron microscopes pass electrons through thin specimen
- scanning electron microscopes bounce electrons off specimens that are
dry and hard
Eukaryotic cells - 🧠ANSWER ✔✔- genetic material contained within
membrane-enclosed structures
- complex and make up bodies of animals, plants, fungi, and protists
Prokaryotic cells - 🧠ANSWER ✔✔- do not have a nucleus
- single cells of bacteria and archaea and simplest forms of life
cells are small - 🧠ANSWER ✔✔range in size from about 1 to 100
micrometers in diameter
, cells share common features - 🧠ANSWER ✔✔descended from ancestor
that arose about 3.5 billion years ago
Cells are so small, so they can ________ _________ and ______ with their
________ ___________. - 🧠ANSWER ✔✔exchange nutrients
wastes
external environment
diffusion - 🧠ANSWER ✔✔- slow process by which molecules dissolved in
fluids move
- all parts of cell must remain close to external environment to have access
to nutrients and be able to get rid of wastes
plasma membrane - 🧠ANSWER ✔✔- each cell surrounded by thin
membrane
- encloses cell and allows interaction between cell and its environment
- consists of proteins embedded in bilayer of phospholipids
- two types of proteins: channel and receptor
channel proteins - 🧠ANSWER ✔✔allow specific molecules to pass into or
out of cell
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
