Where do rays enter the eye?
Options:
- (A) glass
- (B) Summer
- (C) pupil
- (D) lenses
- (E) harmful
- (F) the sun
- (G) photons
- (H) skin
--
Let's think first: Light enters the eye through an opening called the pupil. Light rays are focussed on the retina. When rays are shined at the eyes, they enter an opening called the pupil.... So the answer is [(C)]


Lipid stores are used by plants and animals for what?
Options:
- (A) energy.
- (B) liver
- (C) glycoproteins
- (D) survival
- (E) energy
- (F) growth
- (G) blood sugar
- (H) food
--
Let's think first: Organisms use lipids to store energy. Plants and animals are organisms. Plants and animals use lipids to store energy.... So the answer is [(E)]


What are single celled organisms that do not have a nucleus?
Options:
- (A) Most plants
- (B) nucleus
- (C) ferns
- (D) fossil fuels
- (E) bushes
- (F) Eukaryotes
- (G) leech
- (H) bacteria
--
Let's think first: Prokaryotes are single-celled organisms that lack a nucleus. Prokaryotes are usually microscopic and bacteria is an example of a prokaryote. Bacteria are single celled organisms that do not have a nucleus.... So the answer is [(H)]


What do reptiles have?
Options:
- (A) wild rides
- (B) nerves
- (C) toadies
- (D) Bodily water
- (E) backbones
- (F) four limbs
- (G) Leptospirosis
- (H) pipe
--
Let's think first: Vertebrate chordates have a backbone. Because reptiles are vertebrates, they are chordates. Reptiles have backbones.... So the answer is [(E)]


Organisms use what to store energy?
Options:
- (A) food
- (B) skin
- (C) fat
- (D) RNA
- (E) batteries
- (F) CO 2
- (G) bone
- (H) O2
--
Let's think first: Organisms use lipids to store energy. Another name for fat is lipid . Organisms use fat to store energy.... So the answer is [(C)]


What do the building blocks of dna bind together to form?
Options:
- (A) A compound that donates proton
- (B) colors of the spectrum
- (C) Electrical energy
- (D) chain called a polynucleotide
- (E) Something with exactly eight protons
- (F) Something that makes plants green
- (G) Something with a head, thorax, and abdomen
- (H) biological diversity
--

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Many nucleotides bind together to form a chain called a polynucleotide. Nucleotides are the building blocks of DNA . The building blocks of DNA bind together to form a chain called a polynucleotide.... So the answer is [(D)]