Science Exam 5 he Student Number Answer the following questions in the 33. If th

Question

Science Exam 5 he Student Number Answer the following questions in the 33. If the insect in the picture to the left uses camouflage to siudent's Name space provided. from predators, what color would it most likely be? one advantage for the birds in the photograph to the right advant e that 4 A. Describe in forming a flock. Describe one potesadvtage for these birds in forming a flock. 20 of the study guide, you learned about tap roots. Why would having a tap an advantage to a plant in an environment where there were long periods of drought? root Be sure to define tap roor in your answer. 36. Imagine you are out mountain climbing and come across a large lake with crystal clear water A. Would this lake be likely to support a large number of organisms? Explain the reasonis) for your answer you continue your walk, you come across a meadow. What was most likely here before the meadow? B. As progression? That is, how would the area change? C. What would be the next step in its Explain the reason for your answer (over) 231

Explanation / Answer

Ans:

33. From the picture we can see the insect is on a leaf, hence it should be green, if dry leaf environment some insects have brown or pale brown or straw color. camouflage is acquiring the surrounding color to escape predators or act as predators .

34. A: opportunity for courtship, breeding and motor neuronal skill development in young ones etc, protection from predators – predators gets confused to single out and attack the weak, save warmness in winters. More prying eyes to protect themselves than single birds.

B. Major Disadvantage is spread of disease - rapidly spreads and may wipe out entire generation, may lead to extinction. Rapid depletion of food sources etc.

35. Taproot system helps in long drought conditions because taproots are deep-rooted in and not only enables the plant to anchor better to the soil and obtain water from deeper sources. Taproot is defined as the long deep main root system to absorb water, minerals and may modify to store food to negate draught conditions.

36. A. No the lake cannot support the large number of organisms. Based on the geographic location mountain lakes are located high above the mean sea level where most of the year are frozen and melt during summers. Dissolved Oxygen levels can be low because of high altitude, cannot support phytoplankton life and cannot act as producer hence cannot support large ecosystem due to this low nitrogen, carbon and mineralisation may result in water appearing crystal clear. Some times mountain lakes are without an outlet to discharge in that case they turn salty hence cannot support life and water remains crystal clear.

B. Meadows are grass lands without non woody plants, shrubs may exist. They attract and support a large animal ecosystem. Alpine or mountain meadows formed from a platue land or drained out lake due to lack of precipitation or no snow or snow melting reaching the flat areas.

C. Next step progression depends on many factors. If no grazing animals it turn in to shrub land or woody plants may encroach. If grazing animals are present it remains a grassy meadow. It depends on the where this meadow is located, if its located above tree line then it remains as a grassy or grassy, shrub and cushion plants and ground hugging moss, rocks filled with lichens meadow

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