Heredity

Question 1

genes are,

Answer 1

sequences of nucleotides in DNA

Question 2

Mutations

Answer 2

change in base pairs lead to changes in protein expression and ultimately in phenotype

Question 3

DNA combines with proteins to form

Answer 3

chromatin

Question 4

which is divided into discrete strands called

Answer 4

chromosomes

Question 5

The position of a gene in a chromosome is called the

Answer 5

locus

Question 6

The development of vascular tissue in tracheophytes led to an evolutionary explosion known as the

Answer 6

Sirlurian-Devonian terrestrial revolution

Question 7

The tracheophytes are divided into two major clades, which diverged ~400 mya:

Answer 7

• the lycophytes
  -all others- including monilophytes (ferns) and seed plants!

Question 8

Lycophytes have

Answer 8

sporangia attached laterally to the stems

Question 9

their leaves are called

Answer 9

microphylls - single vascular bundle

Question 10

There are 3 extant lineages of lycophytes:

Answer 10

-the lycopodium group
-Selaginella
-Isoetes

Question 11

Monilophytes

Answer 11

branched early from lycophytes but convergently evolved several traits

Question 12

their leaves are called

Answer 12

megaphyll- multiple vascular bundles

Question 13

Whisk ferns (also called psilophytes) - only two extant genera

Answer 13

Psilotum and Tmesipteris