1. Look at the pictures. 

Which sign should be put on the bench?
(A)
(B)
(C)
(D)

47. Similar species can coexist in a community because of (A)resource partitioning. (B)competitive exclusion. (C)allopatric competition. (D)sympatric competition. (E)allopatric competition and sympatric competition. 

48. Ecosystem ecology is primarily concerned with (A)ecosystem stability. (B)interactions among species. (C)the synthesis of new forms of nutrients. (D)patterns of species diversity. (E)movement of energy and materials through organisms and their communities.

49. Species that create, modify and maintain habitat are known as (A)indicator species. (B)keystone species. (C)dominant species. (D)SLOSS builders. (E)ecosystem engineers.

50. Which of following is NOT true? (A)Many Alu elements are transcribed into RNA. (B)Simple sequence DNA makes up 3% of the human genome. (C)The chimpanzee contains many copies of a retroviral provirus not present in humans. (D)There are more Alu elements in the chimpanzee genome than in the human genome. (E)Copy-number variants (CNVs) are more likely to have phenotypic consequences and to play a role in complex diseases and disorders.

2. It is ___for me to go to work by bus. My office is very near the bus stop. (A) convenient (B) dangerous (C) difficult (D) special

3. The ___called the police after he caught the girl who took a pair of shoes out of his store without paying. (A) cook (B) mailman (C) waiter (D) shopkeeper

4. ___Annie knows fast food is not good for her health, she still eats it. (A) Although (B) Because (C) If (D) When

5. Bill never carries a bag or a wallet when shopping. Every time he has to pay, he takes out money from his ___. (A) blanket (B) drawer (C) mailbox (D) pocket

6. I don’t have ___workers to finish painting the office in two days. Can you find some more to do the job? (A) enough (B) few (C) most (D) total

7. When the kid was trying to pick up the plate, it ___from the table, hit the floor, and broke into pieces. (A) arrived (B) jumped (C) hung (D) dropped