Cutting down trees has a negative impact on an ecosystem, and oak trees are so strong. Given these facts, what has a negative impact on an ecosystem among the following options: - massive damage  - Pesticides  - good weather  - Destroy bridges  - planting trees  - normal water levels  - deforestation  - cutting down oaks
cutting down oaks

All cells share some of the same structures and basic functions, and biological structures are too complex. Given these facts, what do all cells share among the following options: - basic function  - Veins and arteries.  - exact structure  - how they look  - energy usage  - Electrical energy  - types of protein  - Chemical energy
basic function

Q: Grasses supply most of the food consumed by people worldwide, and grasses are an important source of food for people as well as animals. Given these facts, what relies on grass as a food source among the following options: - Bacteria  - Soil  - humans  - More grass  - perennials  - alpacas  - Animals  - tortoises
A: Animals

Question: The digestive system breaks food into nutrients for the body, and catabolism is the breaking down of food. Given these facts, what does the digestive system use to produce nutrients for the body among the following options: - Proteins  - Enzymes  - oysters  - catabolism  - lungs  - ice cubes  - hair  - nutrients
Answer: catabolism

*Question*
Organisms cluster around hydrothermal vents in the ocean floor, and to survive, some organisms living near hydrothermal vents have formed close associations. Given these facts, how is survival ensured around hydrothermal vents among the following options: - heat produced  - Eating a lot  - Reproducing quickly  - biological diversity  - vegetation  - Being in a cluster  - Staying far apart  - hydrate their cells
**Answer**
Being in a cluster

Q: Phytoplankton are bacteria and algae that use sunlight to make food, and phytoplankton, or plant plankton, needs sunlight to live, the same way plants on land do. Given these facts, what does plant plankton need for food among the following options: - Sunlight  - chemicals  - glucose  - warmth  - Bodily water  - photons  - The Sun  - Energy

A: Sunlight