Question

2 which of the following is an example of a population?
a all the fish, plants, and insects in a lake
b a single frog sitting on a log
c all the frogs living in a pond
d sunlight and water in a stream
3 which is an example of an abiotic factor interacting with a biotic factor in an ecosystem?
a a plant uses sunlight to perform photosynthesis
b a bee pollinates a flower when it gathers nectar
c a grizzly bear catches and eats a migrating salmon
d the sun melts an icicle into a puddle of liquid water
based on the data in the table, what is the most likely relationship between rainfall and the plant population in this ecosystem?
month | rainfall (in inches) | plant population (count)
january | 1.5 | 450
february | 2 | 500
march | 4.5 | 620
april | 5.2 | 750
may | 3.1 | 600
june | 2.5 | 550
a as rainfall increases, the plant population decreases.
b there is no clear relationship between rainfall and plant population.
c the plant population is only affected by biotic factors, not rainfall.
d a higher amount of rainfall is generally associated with a large plant population.

Explanation:

Step1: Analyze question 2

A population is a group of the same - species organisms living in the same area. All the frogs living in a pond is a population. A single frog is an individual, all the fish, plants and insects in a lake is a community, and sunlight and water are abiotic factors.

Step2: Analyze question 3

An abiotic - biotic interaction is when a non - living factor interacts with a living factor. A plant using sunlight for photosynthesis is an example where sunlight (abiotic) and a plant (biotic) interact. A bee pollinating a flower is biotic - biotic, a bear eating a salmon is biotic - biotic, and the sun melting an ice - cube is abiotic - abiotic.

Step3: Analyze question 4

Looking at the table, as the rainfall amount increases (from 1.5 inches in January to 5.2 inches in April), the plant population count also increases (from 450 to 750). As rainfall decreases (from 5.2 inches in April to 2.5 inches in June), the plant population count decreases (from 750 to 550). So, a higher amount of rainfall is generally associated with a large plant population.

Answer:

1. C. All the frogs living in a pond
2. a. A plant uses sunlight to perform photosynthesis
3. D. A higher amount of rainfall is generally associated with a large plant population.