lecture 3

Question 1

what is variability?

Answer 1

many kinds of organisms within each kind of organism

Question 2

what is stability?

Answer 2

within kinds of organisms

Question 3

When was the microscope developed? & what was observed?

Answer 3

1600s. cells

Question 4

When was the nucleus first viewed?

Answer 4

1700s

Question 5

When were staining procedures developed? what was viewed for first time?

Answer 5

1800s. chromosomes

Question 6

when was the cell theory developed?

Answer 6

early 1900s

Question 7

When was DNA discovered?q

Answer 7

late 1900s

Question 8

are chromosomes Eukaryotic or prokaryotic?

Answer 8

eukaryotic

Question 9

describe DNA

Answer 9

long thread-like molecules tightly coiled into chromosomes

Question 10

how many chromosomes do humans have?

Answer 10

46

Question 11

what are genes?

Answer 11

specific regions of DNA located linearly on specific chromosomes (hundreds of thousands of genes per chromosome

Question 12

what are haploid cells?

Answer 12

one of each kind of chromosome

Question 13

What are diploid cells?

Answer 13

2 of each kind of chromosome

Question 14

What is cytokinesis?

Answer 14

cell division

Question 15

what are methanogens?

Answer 15

make up most of Earth’s atmosphere (co2+h2

Question 16

what percentage of methane gas is from rhewmanins?

Answer 16

30%