Natural Sciences 8

What type of cell has a nucleus?

• Eukaryotic

• Prokaryotic

Directs all cell activities through the DNA located there.

• Endomembrane System

• Nucleus

• Ribosomes

• Mitochondria

Helps assemble ribosomes, which are combinations made of protein and RNA (ribonucleic acid ).

• nuclear membrane

• nuclear pores

• nucleoplasm

• nucleolus

A double stranded helix that holds the code for all the cells in the body.

• RNA

• DNA

• Chromatin

• Nucleus

What is the nucleus?

• A part of the cell that tells everything else what to do.

• An organ that makes you healthy.

• A wall that protects everything in the cell.

Which organism performs all life processes in one cell?

• grass

• bacteria

• mushroom

• butterfly

Which best explains why humans are multicellular organisms?

• Human cells are too small to function alone.

• Human cells join together to form one large cell.

• Humans need many cells to carry out life processes.

• Humans have many systems that perform the same function.

How are single-celled organisms and multi-celled organisms similar?

• Both need food for energy and growth.

• Both have a skeletal system for support.

• Both require the interaction of many cells to survive.

• Both are able to carry out all life functions in only one cell.

How are multi-celled and single-celled organisms different?

• Multi-celled organisms need energy to survive, while single-celled organisms need no energy to survive.

• Single-celled organisms can be seen without using a microscope, while multi-celled organisms are microscopic.

• Multi-celled organisms have large numbers of specialized cells to perform a variety of life functions, while single-celled organisms complete life functions with one cell.

• Single-celled organisms have large numbers of identical cells that all perform the same function, while multi-celled organisms have cells that are all different and perform different life functions.

Which is a difference between frogs and bacteria?

• Frogs are able to control all life processes in one cell, while bacteria cannot.

• Frogs are single-celled organisms, while bacteria are multi-celled organisms

• .Frogs are multi-celled organisms, while bacteria are single-celled organisms.

• Frogs must rely on other single-celled organisms for survival, while bacteria are dependent only on themselves.