Biology Questions & Answers

Section 2 10. List two reasons STDs in teens are considered a "silent epidemic". \( \begin{array}{l}\text { 11. What percentage of all new STD cases occur in } \\ \text { people between the ages of } 15 \text { and } 19 \text { ? } \\ \begin{array}{ll}\text { a. } 1 \text { percent } & \text { d. } 50 \text { percent } \\ \text { b. } 10 \text { percent } & \text { d. } 50 \text { percent }\end{array} \\ \begin{array}{l}\text { 12. What are three reasons that teens are at high risk } \\ \text { for being infected with STDs? }\end{array} \\ \begin{array}{l}\text { 13. Describe how each of the following steps can } \\ \text { protect you against STDs. } \\ \begin{array}{l}\text { a. practicing abstinence } \\ \text { b. avoiding alcohol and drugs }\end{array}\end{array}\end{array} \)

2. Explain the relationship between the key terms in each pair below. a. epidemic and sexually transmitted disease b. chlamydia and pelvic inflammatory disease

1. For each definition below, choose the key term that best matches the definition. a. bacterial STD that causes ulcers b. showing no signs of illness or disease c. most common bacterial STD in the United States d. inflammation of the upper female reproductive tract e. virus that causes genital warts

11. Explain why people are more likely to contract a sexually transmitted disease during their lifetime if they become sexually active at a younger age.

4. Explica por qué un animal que se encuentra en los estuarios es inusual.

Causes of habitat destruction include a poor fire management and storm damage. b mining and pollution. c overfishing. d all of the above

What type of species reproduce and grow unchecked, and have detumental elfects on the ecosystems to which they are invoduced? These species are also known as non-native species. a invasive b symbictic c keystone

Which of these organisms contain matter that was once part of the bilberry? Select all that apply. mushroom earthworm

20. Juan studied this food web and said that hawks were the last link in every food chain shown. Vicky pointed to a different organism and said that it was the last Unk. Which organism did Vicky identify? What was her reasoning?

Which of the following statements is not part of the cell theory? all cells must come from preexisting cells the basic unit of life is the cell all living things are made up of one or more cells all cells have nuclei and other organelles