Q: Fact 1: Mutations may change the structure of a chromosome or just change a single nucleotide. Fact 2: Nucleotides are the building blocks of DNA . Given the two facts above, mutations may change the structure of the what of DNA? | OPTIONS:
- personalities
- mutations
- solid, liquid, gas
- building blocks
- gastropod shells
- Veins and arteries.
- hosts
- an organism's body
A: building blocks

Q: Fact 1: Feathers help birds fly and provide insulation. Fact 2: Straight feathers are dominant to curly feathers . Given the two facts above, a part of birds where what is dominant to curly helps them fly and provides insulation? | OPTIONS:
- Animal fur
- bioaerosols
- fur and fat
- Vanes
- Epidermis
- sweating
- staying warm
- straight
A: straight

Q: Fact 1: Steroid hormones are made of lipids, such as phospholipids and cholesterol. Fact 2: Lipids Lipids are diverse hydrophobic molecules. Given the two facts above, what is made of diverse hydrophobic molecules? ? | OPTIONS:
- solid, liquid, gas
- gastropod shells
- fur and fat
- Steroid hormones
- an object
- Veins and arteries.
- bioaerosols
- Most plants
A: Steroid hormones

Q: Fact 1: Bacteria cause food poisoning. Fact 2: Botulism is food poisoning produced by a bacteria. Given the two facts above, what causes botulism? ? | OPTIONS:
- virus
- sunlight
- Echinoids
- Bacteria
- Pesticides
- Roundworms.
- influenza
- parasite
A: Bacteria