Fact 1: Oxygen is essential for cellular respiration for all aerobic organisms. Fact 2: Cellular respiration is a requirement for life. Given the two facts above, which is a requirement for life?

OPTIONS:
- glucose
- hydration
- sunlight
- scandium
- recovery
- oxygen
- uranium
- radon

Answer: oxygen

Problem: OPTIONS:
- hitting
- waves
- beating
- wind
- messengers
- a doorbell
- heat
- tapping
Q: Fact 1: Hitting an object causes the particles in that object to vibrate. Fact 2: Electrical particles in materials vibrate and accelerate. Given the two facts above, what moves electrical particles in an object ?
Answer: hitting

Problem:OPTIONS:
- humans
- vitamins
- h2o
- harmful substances
- cancer cells
- electrons
- the skin
- protect them

Fact 1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens. Fact 2: Antigens are expressed by cancer cells. Given the two facts above, what do antibodies recognize and bind to?
****
A: cancer cells

Fact 1: Evolution is a change in the characteristics of living things over time. Fact 2: Evolution relies on random chance acts to cause mutations. Given the two facts above, what causes changes in characteristics of living things over time?
OPTIONS:
- mutations
- science
- parents
- environment
- light energy
- news
- alleles
- animals
mutations

Fact 1: Echinoderms lack a centralized nervous system. Fact 2: Starfish and sea urchins are also echinoderms. Given the two facts above, what lacks a centralized nervous system?
OPTIONS:
- Damaged hearing
- Pesticides
- Cats
- insects
- Sea urchins
- barnacles
- Humans
- Fish

Answer: Sea urchins

input with options: Fact 1: Secondary growth forms secondary vascular tissues and bark. Fact 2: Some, such as bamboo and palm trees, have secondary growth. Given the two facts above, secondary vascular tissues are employed by bamboo and what other kind of tree?
OPTIONS:
- plants
- ferns
- grass
- coniferous
- Trees
- elms
- palm
- deciduous
output:
palm