Riding a bike does not cause pollution, and carbon monoxide is, of course, an air pollutant. Given these facts, what is not released after riding a bike among the following options: - carbon monoxide - harmful substances - fossil fuels - heat energy - one celled organisms - hard outer covering - layers of fat - Pituitary gland
carbon monoxide

Mammals breathe with the help of a diaphragm, and pugs are mammals and mammals shed. Given these facts, what breathes with the help of a diaphragm among the following options: - viruses - pugs - otters - bacteria - pigs - phytoplankton - humans - cats
pugs

Q: Lions live in social groups called prides, and lions live in Africa. Given these facts, where are there social groups called prides among the following options: - under the sea - outer space - complex - protected - arctic - fur seals - Summer - africa
A: africa

Question: Arthropods have a life cycle with sexual reproduction, and sexual reproduction requires both male and female gametes. Given these facts, what do arthropods require to have children among the following options: - glucose - work - gametes - games - fun - Energy - Energy. - food
Answer: gametes

*Question*
Having no natural predators increases population size, and any population has the potential to produce more offspring than the environment can support. Given these facts, having what increases the potential to produce more offspring than the environment can support among the following options: - no natural habitat - no natural prey - competing for resources - peachleaf willow - no natural owners - members of their own species - animals with backbones - no natural predators
**Answer**
no natural predators

(Q).
Caffeine is a central nervous system stimulant, and cocaine is a stimulant and increases the user's heart rate and blood pressure. Given these facts, what does caffeine do among the following options: - Increase fame - increases a body's strength - Release energy - Increase user's heart rate - Transfers energy - decrease stamina - Increase intelligence - Increase wealth
(A).
Increase user's heart rate