CER Test Study Guide Biology Questions with All Correct Answers

CER Test Study Guide Biology Questions with All Correct Answers What are some predators of UCSD Juncos? - Answer-Cats, hawks and cars. What are some variables of the UCSD environment? - Answer-Plenty of tall trees, food centers, plenty of restaurants, less than a mile from ocean, lots of agriculture, lots of people, high skyline, lots of leaves. What are some variables of the Mt. Laguna environment? - Answer-Lots of cut down trees, many very tall trees in some parts, small lakes, large open fields, snow in winter, lots of succulents, large desert east of mountain, has rivers and creeks. *Read L18 Data packet B in booklet on page 28 - Answer-*Read L18 Data packet B in booklet on page 28 What is crest and what gene influences this trait? - Answer-Crest is when feathers on the back of the head stick up. It is caused by the EPHB2 gene. What is color and what gene influences this trait? - Answer-Blue = wild type, brown, ash-red, most visible on wings. Caused by 1 TYRP1 gene. What is the trait of spread? - Answer-Spread is where the feather color is the same throughout the body. No spread is when colors vary throughout the body. What is recessive red and what gene affects this trait? - Answer-Recessive red, not recessive red. NRR, RR What is dilute and what gene affects this trait? - Answer-Dilute= Lighter color feathers Non-dilute=Darker feather color Influenced by 1 SLC4542 How do you measure the wing length of a Junco? - Answer-Capture the birds with a mist net then measure their wing length with a ruler. Which Junco has greater average wing width? UCSD or Mt.Laguna juncos? - Answer-The average wing width for Mt.Laguna Juncos is greater than the average wing width of the UCSD Juncos. The average tail length of the Mt. Laguna Juncos is the top 16% of the tail length of the UCSD juncos.The female UCSD juncos average wing width is less than the male average wing width. How did scientists measure the amount of white in a junco's tail feathers? - Answer-To measure the amount of white in a Junco's tail, scientists placed mist-nets in particular locations and caught the birds. They then plucked feathers off of the birds and took pictures of them. They then scanned them to converst them from physical to digital and measured the amount of white through a program on the computer. Which Junco had whiter tail feathers? - Answer-Mt. Laguna Juncos had whiter tail feathers than UCSD juncos. The mean amount of white in the tail feathers of the Mt. Laguna male juncos was 43.9% white while the mean amount of white in the UCSD juncos was 36.3%.