This document contains a biology exam for senior year students covering the topic of organisms and their environment. The exam contains questions about a food web from Antarctica, the effects of increased carbon dioxide and human environmental impacts. It also asks students to identify structures in diagrams, compare sexual and asexual reproduction, and discuss reproduction differences and similarities between potatoes and onions.

1. Materia: Biology Senior 4
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Organisms and their environment
TERCER TRIMESTRE
Fecha de presentación: December 2014
1) Fig. 6.1 shows a food web from the Antarctic.
(a) (i) State the original source of energy for this food web.
(ii) Name an organism in this food web that is both a secondary and a tertiary consumer.

2. (b) Write in the names of organisms from Fig. 6.1 to form a complete food chain.
(c) There is concern that pollution of the environment may change the breeding grounds of the Adelie penguin.
State and explain the effect this might have on the populations of the Leopard seal and the Ross seal.
-Leopard seal
-Ross seal
2) Explain the effects of an increase in the concentration of carbon dioxide in the atmosphere.
3) Name and explain the human impact on the environment shown in the picture

3. 4)
(b) State the function of structures C and D
C …………………………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………………
D …………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………..
5) Complete the table with 2 differences between sexual and asexual reproduction. The first line has been done for you.
ASEXUAL SEXUAL
1 parent 2 parents
6) Potatoes and onions reproduce asexually.
State two differences and one similarity between them.
Differences
1 ………………………………………………………………………………………………………………..
2 ………………………………………………………………………………………………………………………
Similarity ………………………………………………………………………………………………………………….