Problem:OPTIONS:
- flowers
- swea
- seeds
- white
- sperm
- embryos
- cacti
- CO 2

You are presented with the quiz "pollen consists of tiny grains of what part of plants?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "pollen consists of tiny grains that are the male gametes of plants" and "male gametes are sperm". So, what's the best answer to the question?
****
A: sperm

Problem:OPTIONS:
- murmur
- reflexes
- vehicles
- movement
- rain
- photons
- waves
- an object

You are presented with the quiz "what can animals be startled by?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "loud noises can cause animals to startle" and "all animals are startled by an unannounced approach, a sudden movement, or a loud noise". So, what's the best answer to the question?
****
A: movement

Problem:OPTIONS:
- nuclear
- kidney
- cell wall
- dangerous
- white
- parasites
- negative
- cancer

You are presented with the quiz "what kind of cells are abnormal?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cancer cells divide more often than normal cells, and grow out of control" and "cancer cells are abnormal and divide without control or order". So, what's the best answer to the question?
****
A: cancer

Problem:OPTIONS:
- opossums
- humans
- people
- fish
- exercise
- ants
- h2o
- catabolism

You are presented with the quiz "what plays to learn how to behave?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "playing is one way mammals and other animals learn how to behave" and "opossums are a type of mammal called marsupials". So, what's the best answer to the question?
****
A:
opossums