Chapter 1

Question 1

The three tenants of cell theory

Answer 1

1) all organisms are composed of one or more cells
2) the cell is the structural unit of life
3) cells arise only by division from pre-existing cells by passing the genetic information down to the offsprings

Question 2

What are the basics properties of cells

Answer 2

1) they are highly complex and organized and possess genetic information that allows them to multiple themselves mitosis and meiosis
2) they need energy and it carries to in multiple chemical reactions that are called metabolism
3) they respond to stimuli and can self regulate

Question 3

What is LUCA?

Answer 3

last universal common ancestor

Question 4

fundamental differences between prokaryotes and eukaryotes

Answer 4

• Prokaryotes don’t have nucleus and all their organelles exist in cytoplasm
• eukaryotes are more complex replication process
• prokaryotes have less DNA

Question 5

the advantages of model organisms

Answer 5

• relatively easy to grow
• reproduce quickly with many offsprings
• cheap to breed
• easy to manipulate

Question 6

what’s limit cell size

Answer 6

• the volume of cytoplasm that can be supported by nutrients and the genes of the nucleus
• by the distance that substances can efficiently travel through the cytoplasm via diffusion

Question 7

what is the scientific method

Answer 7

is how we assess new information. a hypothesis is formed and we collect data and do experiments to asses if the hypothesis can be accepted or rejected.

Question 8

what is an hypothesis?

Answer 8

its a testable statement that form to explain a model

Question 9

what’s a theory ?

Answer 9

a widely hypothesis that has been tested by many different people

Question 10

what’s a law?

Answer 10

a statement of fact that has been tested and confirmed over a long period of time with virtually no doubt of its validity