Blowing air into a whistle causes air to vibrate inside the whistle, and pipe organ Vibrating columns of air inside the pipes are the sound source. Given these facts, blowing air into a whistle causes a what among the following options: - rapid blast of heat - kinetic energy - little beads - activation energy - sound source - wind speed - small rattling - mechanical
sound source

Invertebrates are animals that lack a vertebral column, or backbone, and many invertebrates have an exoskeleton. Given these facts, many animals that lack a vertebral column, or backbone have a what among the following options: - spine - exoskeleton - parasites - Leptospirosis - epidermal - Damaged hearing - skeleton - hip bone
exoskeleton

Q: If something is outside during the day then that something will receive sunlight, and sunlight is a form of radiation . Given these facts, if something is outside during the day it will receive what among the following options: - photons - heat energy - energy - applause - Solar energy - derision - photographs - radiation
A: radiation

Question: Chemical weathering causes iron in rock to oxidize, and low rainfall means slow chemical weathering of rock. Given these facts, what can lead to oxidation of iron in rock among the following options: - heat energy - low rainfall - flow of electrons - permineralization - fossil fuels - harmful substances - boiling - evaporation
Answer: low rainfall

*Question*
Roundworms reproduce sexually, and nematodes are millimeter-sized roundworms. Given these facts, what reproduces sexually among the following options: - Most plants - nematodes - planets - bacteria - insects - the Sun - ferns - humans
**Answer**
nematodes

(Q).
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
(A).
no natural predators