In a mangrove swamp, the roots of the mangrove trees trap plant debris on which pink shrimp feed. Great blue herons are among the animals that feed on the pink shrimp living among the roots. Little Red Bat Bocourt Swimming Crab Pink Shrimp Brown Pelican Great Blue Heron Pinfish Which statement below explains the role of the pink shrimp in this food web. O Processes organic material to produce nutrients for plant growth O Keeps populations of overabundant species under control O Enables energy to flow from plant debris to other organisms O Produces energy that forms the foundation of the food chain Cushion Sea Star

DNA Fragment wich Human Gene Recombinant Plasmid Plasmid Vector Bacterial DNA Recombinant Plasmid Transformed Bacterial Cell Bacterial Cell Produces Human Protein Genes for medically important proteins can be cloned and inserted into bacteria resulting in recombinant bacterial DNA, as shown in the diagram below. Why can bacteria recognize a human gene and then produce a human protein? Bacterial cells and human cells contain the same kind of chromosomes Bacterial cells contain the same organelles as human cells O DNA replication in bacteria and humans is the same O The basic components of DNA are the same in humans and bacteria

Fill in the blank with the correct word: According to theory, excluding the herbivore deer should lead to small mammal abundance in the exclosure. greater O lower

1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the introduction of the Nile perch (Leveque 1995). Calculate the mean food chain length, percent of trophic groups at various levels, and connectance for each food web. Oreochromis Insectivorous Fish Chironomids Chaoborous Man Piscivorous Fish Zooplanktivorous Haplochromines Rastrineobola Zooplankton Detritus/Phytoplankton Lake Victoria in the 1970s Detritivorous Phytoplanktivorous Haplochromines Figure 31.2. (a) Food web structure of Lake Victoria before introduction of the Nile Perch. [continued on next page) Molluscivorous Fish Molluscs

What is the difference between primary consumers and tertiary consumers?   A. Primary consumers are carnivorous; tertiary consumers are omnivorous or carnivorous. B. Primary consumers are herbivorous; tertiary consumers are omnivorous or carnivorous. C. Primary consumers are carnivorous; tertiary consumers are herbivorous. D. Primary consumers metabolism chemical energy; tertiary consumers require plants or animals

Which living thing will ultimately get the least amount of energy in a food chain?     deer     wolf     grass     vulture

Describe some ways in which humans have increased our carrying capacity over time.  Do you think that humans have currently reached our carrying capacity?  Explain.