Mutation creates new genetic variation in a gene pool, and genetic variation is the basis for natural selection. Given these facts, what is the basis for natural selection among the following options: - animals - Artificial construct - stasis - root growth - mutation - magic - trees - competition
mutation

Atape measure is used to measure length, and all sizes are total length. Given these facts, a tape measure is used to measure what among the following options: - waves - salinity - all sizes - speed - layers of fat - Weight - heat energy - forces
all sizes

Q: Echinoderms lack a centralized nervous system, and from animal experiments, it seems to be a central nervous system toxin. Given these facts, echinoderms are resistant to some: among the following options: - starfish - enzymes - Toxicity - pesticide - parasites - toxins - boats - chemicals
A: toxins

Question: Population density is the average number of individuals per unit of area or volume, and another measure of growth is population density. Given these facts, what can be determined by the average number of people per one unit of area among the following options: - hygeine - emissions - animals - growth - forces - health - education - people
Answer: growth

*Question*
Aplants require water for survival, and water contains hydrogen and oxygen. Given these facts, what do plants require for their survival among the following options: - Light - Proteins - Energy. - salinity - hydrogen - nutrients - sunlight - food
**Answer**
hydrogen

Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes, and mitosis is cell division. Given these facts, what is the final stage of mitosis among the following options: - Anaphase - Metaphase - Prophase - rapid expansion - Cytokinesis - autumn - Plants growth - Most plants
Cytokinesis