Describe a food chain for a temperate forest community that contains at least four links. use the following organisms: grizzly bears, oak trees, mice, squirrels, deer, robins, foxes, mushrooms, grass plants, and grasshoppers. identify the level of each organism in the food chain.

Oak trees, grass plants are Producers.

Grasshoppers, deer, mice, and squirrels are Primary consumers, they are eating producers.

Foxes, robins are Secondary consumers, they are eating primary consumers(depending on their nature)

Grizzly bears are Tertiary consumers, they are eating secondary consumers (like snakes)

Mushrooms are decomposer (which decompose, organic material such as remains of dead material)  

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.