Unit 2: Cells Flashcards
What are the 6 Characteristics of living organism
- Respond to their environment
- Grow, develop, and evolve (change over time)
- Contain genetic material (DNA,RNA)
- Obtain and use energy
- Have the ability to reproduce
- Are made of cells
Organism
Anything that has all the characteristics of life
Atoms
The basic unit of chemical element, a building block of everything
Molecules
2 or more atoms chemically combined
Cells
The smallest form of life
Tissues
A group of specialized cells
Organs
A group of tissues with a specific vital function
Organ-system
A group of organs that work together to perform a certain task
Life process
Process which keeps an organism alive
Which characteristic of life is it?
A dog eats food out a bowl
Obtain energy
Which characteristic of life is it?
A caterpillar becomes a butterfly
Grow and develop
Which characteristic of life is it?
A polar bear has whiter fur and lots of body fat
Responds to environment
Which characteristic of life is it?
A sunflower turns to face the sun
Respond to the environment
Which characteristic of life is it?
In puberty boys get more body hair and muscle
Evolve and contain generic material
Which characteristic of life is it?
A drop of blood has 1000’s of tiny red circles
Made of cells
Which characteristic of life is it?
An 8 pound baby becomes a 140-lb adult
Grow and develop
Which characteristic of life is it?
Bacteria split in half to make more bacteria
Reproduce
Which characteristic of life is it?
Fish have gills for breathing and find for swimming
Evolve
Which characteristic of life is it?
A tree gets 10 inches taller each year
Drove and develop, responds to the environment
Which characteristic of life is it?
Oak tree makes acorns
Reproduce
Which characteristic of life is it?
Leaves are made of tiny square-shaped units
Made of cells
Which characteristic of life is it?
A pumpkins contains thousands of seeds
Reproduce
Which characteristic of life is it?
A tadpole changes into a frog
Grow and develop, evolve
Which characteristic of life is it?
All plants use the sun to do photosynthesis
Responds to the environment, evolve, grow and develop
Which characteristic of life is it?
Leaves shrivel and turn brown during drought
Responds to the environment
Which characteristic of life is it?
A turtles hard shell protects its soft bodies
Grow and develop, evolve, genetic material
What is a cell?
A cell is the smallest unit that is capable of performing life functions
Most are microscopic
What are the parts of the cell theory?
- All living things are made of cells
- Smallest living unit of structure and function of all organism is the cell
- All cells arise from preexisting cells
Characteristics of all Cells ?
A surrounding membrane
Cytoplasm- cells contents in thick fluid
Organelles- structures for cell function.
Control center with DNA
Hooke did what?
Was the first to see “cells”
What did Leeuwenhoek do?
Was the first to see tiny organism in pond water