biology Quiz

What do you think will happen if an ecosystem has a higher number of primary producers than primary consumers.

• A.  There is a balanced food web.

• B.  Primary producers are being overconsumed.

Which statement is TRUE about energy transfer between trophic levels?

• Energy is passed on with 100% efficiency at each level.

• Only about 10% of energy is passed on to the next trophic level.

In an ecosystem, organisms are classified into different trophic levels based on their role in the food chain. Which of these statements CORRECTLY represents the order of trophic levels in a typical food chain?

• A.  Primary producers → Primary consumers → Secondary consumers → Tertiary consumers

• B. Secondary consumers → Primary producers → Primary consumers → Tertiary consumers

What knob must be used to avoid breakage of the glass slide while focusing the sample under high power objective?

• A. Base knob

• C. Fine adjustment knob

What should be manipulated to shift the low power objective to high power objective?

• B. Stage clip

• D. Revolving nosepiece

A sample of an animal cell is viewed under a high-power objective (HPO) whose magnifying power is 40x. If the eyepiece has a magnification power of 15x, how many times is the cell magnified?

• 600

• 650

• 55

Which parts of the microscope represent the two-lens system shown in the picture?

• A. Stage and Objectives

• B. Objectives and Eyepiece

what is the correct precaution that you should follow in order to ensure both your safety and the protection of the microscope?

• Hold it in the inclination joint with one hand and other hand to its base.

• Hold one hand on the arm of the microscope and other hand on the base of the microscope.

What are the two parts that a student should hold to carry the microscope properly?

• A. Arm and Base

• B. Body tube and Draw tube

A killer shark was found dead near the seashore of Batangas. In which of the ecological unit does a killer shark belongs?

• population

• organism