MAP Science 3

Question 1

In a Missouri forest food web, oak trees produce acorns eaten by squirrels, which are eaten by red-tailed hawks. What role do the oak trees play?

Accepted Answer

Producers

Answer

Oak trees make their own food through photosynthesis, so they are producers.

Question 2

Which organelle is the site of cellular respiration in plant and animal cells?

Accepted Answer

Mitochondrion

Answer

Mitochondria break down glucose to release usable energy (ATP).

Question 3

A pea plant heterozygous for tall stems (Tt) is crossed with a short plant (tt). What percentage of offspring are expected to be short?

Accepted Answer

50%

Answer

A Tt × tt Punnett square gives 2 Tt and 2 tt, so 50% are short.

Question 4

Which process allows a population of bacteria to become resistant to an antibiotic over time?

Accepted Answer

Natural selection of bacteria with resistant traits

Answer

Bacteria that already carry resistant variations survive and reproduce, increasing resistance in the population.

Question 5

Zebra mussels, an invasive species, have spread in Missouri waterways. What is the most likely effect on native mussels?

Accepted Answer

Increased competition for food and space

Answer

Invasive zebra mussels outcompete natives for plankton and attach to them, reducing native populations.

MAP - Missouri Assessment Program Practice Test