Why do polar bears have sharp claws?

The net photosynthesis for an entire ecosystem is known as the

What is oxygrn debt

Explain why land use planning has to incorporate such diverse disciplines as architecture, urban planning, and environmental planning.

How does carbon dioxide enter the atmosphere? 1. Animal respiration 2. Pollution - combustion 3. Dead animals decomposition 4. Dead plants 5. All of the above

During temperature inversion ... Question 3 options: 1. sulfur oxides combine with water in the atmosphere 2. an influx of acidic water causes a rapid change in the pH of water 3. levels of ground-level ozone decreases 4.

Mention the importance of pancreas

What substance is insoluble in water? quartz vinegar sugar salt

Curly hair, large nose, brown eyes: our give the instructions that determine human traits, like these?

What can a deficiency of growth hormone during bone formation cause? inadequate calcification of bone decreased epiphyseal plate activity decreased osteoclast activity increased osteoclast activity

What is responsible for respiration in fish lungs gills tracheae skin