Bio homeworkk help please?

19. Which statement best describes the difference between the life cycle of plants such as ferns and animals such as humans? (Points: 5)


Plants have a one-part life cycle and are entirely diploid. Humans spend their lives in a haploid phase.


Plants have a two-part life cycle, spending part of their life in a diploid phase and part in a multicellular haploid phase. Humans spend their lives in a diploid phase and produce gametes that are haploid.


Plants have a one-part life cycle and are entirely haploid. Humans have a two-part life cycle, spending part of their life in a diploid phase and part in a multicellular haploid phase.


Different plants have a different number of phases in their life cycle. Humans always have two phases in their life cycle.








20. The human immune system uses a variety of means to defend the body from pathogens. Which elements are parts of the human immune system? (Points: 5)


skin, neurons, muscle cells, and pancreas


white blood cells and red blood cells


skin, lymph nodes, white blood cells, and spleen


mucous, urine, and kidneys








21. Which abiotic factor is found in a desert? (Points: 5)


a top predator


a snake


a primary consumer


none of the above








22. Which consequence occurred when sea otters were overhunted along the Pacific Coast? (Points: 5)


The kelp grew rapidly and created new habitat for fish.


The sea urchin population was reduced to dangerous levels.


The sea otters on the Pacific Coast went extinct.


The sea urchin population expanded and consumed the kelp and damaged the habitat.








23. Which answer lists the levels of the biosphere from smallest to largest, left to right? (Points: 5)


ecosystem—individual—population—biome—co...


individual—population—community—ecosyste...


ecosystem—biome—community—population—ind...


individual—population—biome—community—ec...








24. The following flow of energy occurs in the trophic levels in an ecosystem:


sedge → arctic hare → arctic fox → wolf


Which organism is located in the trophic level that contains the least amount of energy? (Points: 5)


sedge


arctic hare


arctic fox


wolf








25. Global warming and climate change are important topics in environmental biology. In what way, if any, should scientists contribute to the discussion on global warming and climate change? (Points: 5)


The role of scientists is to present research that clearly represents their personal beliefs regarding the issue.


Scientists provide sound scientific data to help society make informed decisions.


Scientists should not get involved in decisions that affect modern society.


Scientists cannot provide accurate information on environmental issues such as global warming.

Bio homeworkk help please?
19. Plants have a two-part life cycle, spending part of their life in a diploid phase and part in a multicellular haploid phase. Humans spend their lives in a diploid phase and produce gametes that are haploid.





20. skin, lymph nodes, white blood cells, and spleen





21. non of the above





22. The sea urchin population expanded and consumed the kelp and damaged the habitat.





23. individual—population—communit...





24. wolf





25. Scientists provide sound scientific data to help society make informed decisions.
Reply:You have asked two questions now. Why don't you actually learn yourself how to do these questions instead of asking others. I know this site is for asking questions... But you my friend are just being lazy.





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