Biology final Exam

In DNA, cytosine always pairs with

• guanine

• uracil

• thymine

• adenine

Vestigial structures show

• how an ancestor may have lived

• how old a fossil is

• what the organism is not related to

• usefulness in the organism that has it

DNA has

• a left handed twist

• a single strand

• genetic information stored in it

• a straight chain structure

DNA has

• a left handed twist

• a single strand

• genetic information stored in it

• a straight chain structure

DNA is made up of phosphates, sugars, and

• proteins

• lipids

• bases

• iodine

A red flower bred to a white flower produces red and white spotted flowers. This is an example of

• incomplete dominance

• recessive genes

• epistasis

• co-dominance

Organisms that rely on other organisms for food are called

• producers

• autotrophs

• consumers

• saprophytes