Question 1

Which evolved first?

Accepted Answer

Bacteria are believed to be the first living organisms on Earth, and they were followed by protists, fungi, and plants in that order.

Question 2

Which consumes decomposing organic matter?

Accepted Answer

Detritovores are organisms that consume decomposing organic matter. They play an important role in recycling nutrients in ecosystems by breaking down dead plant and animal material. Herbivores (B) consume living plant material, parasites (C) obtain nutrients from a living host, predators (D) hunt and kill other organisms for food, and parasitoids (E) lay eggs in or on other insects, ultimately killing the host.

Question 3

Why are protists suited for symbiotic relationships with other species?

Accepted Answer

The answer of Why are protists suited for symbiotic relationships...

Question 4

What pair of species would you expect to be commensalistic?

Accepted Answer

Owls may use oak trees for nesting without harming or benefiting the tree, which is a typical example of commensalism.

Question 5

The law of conservation of matter states that matter cannot be destroyed. Why, then, are we concerned about the depletion of resources?

Accepted Answer

The answer of The law of conservation of matter states...

Question 6

Plants and animals exchange energy and materials with their physical environments. These exchanges occur across surfaces. In animals, surfaces tend to be internal, while in plants, surfaces tend to be external. Discuss the principal reason for this important difference.

Accepted Answer

The answer of Plants and animals exchange energy and materials...

Question 7

Hyphae are structures found in

Accepted Answer

Hyphae are structures found in fungi.

Question 8

Organisms that use photosynthesis or chemosynthesis are

Accepted Answer

Organisms that use photosynthesis or chemosynthesis are able to produce their own food without relying on other organisms, therefore they are autotrophs.

Question 9

What method is used to increase experimental reliability?

Accepted Answer

Replication involves repeating an experiment multiple times to ensure that the results are consistent and reliable. By doing this, any random variation or error in the experiment is minimized, and the true effects of the variables being tested are more accurately determined. Therefore, replication is the most effective method for increasing experimental reliability.

Question 10

A mixotroph is an organism that

Accepted Answer

A mixotroph is an organism that can obtain energy through multiple methods, such as through photosynthesis and by consuming organic matter. It is not limited to just one method of obtaining energy.

Question 11

Many warm-blooded organisms must maintain a constant temperature that is commonly warmer than its surroundings. What is the cost associated with maintaining the dynamic steady state, and how is this cost met?

Accepted Answer

The answer of Many warm-blooded organisms must maintain a constant...

Question 12

An ultimate hypothesis

Accepted Answer

The answer of An ultimate hypothesis
...

Question 13

Blue-green algae are

Accepted Answer

Blue-green algae, also known as cyanobacteria, are classified as bacteria and not as protists, plants, or fungi. They obtain their energy through photosynthesis, but their cell structure and genetic makeup are more similar to bacteria than to eukaryotic organisms.

Question 14

Which interaction is characterized by negative effects for both species?

Accepted Answer

Competition refers to a situation where two or more species compete for the same limited resources such as food, water, and shelter. In this interaction, both species are negatively affected because they have to spend more energy, time, and resources to obtain the limited resources, which can lead to reduced growth, reproduction, and survival.

Question 15

The range of biotic and abiotic conditions a species can tolerate is its

Accepted Answer

A species' niche refers to the range of biotic (living) and abiotic (non-living) conditions it can tolerate, including its role in the ecosystem, its habitat, and the interactions it has with other species.

Question 16

There are many examples in nature of cooperation among organisms, such as the bacteria that inhabit the root nodules of leguminous plants. Partnerships between organisms that live in close association are called

Accepted Answer

The term used for partnerships between organisms that live in close association is "symbioses." Option A ("networks") is too general and could refer to any interconnected system. Option B ("communities") typically refers to groups of different species living in a given area, rather than specifically to partnerships between organisms. Option D ("ecosystems") refers to the interaction between biotic and abiotic factors in a given area.

Question 17

The relationship between a burdock plant and a fox is

Accepted Answer

The relationship between a burdock plant and a fox is an example of commensalism. This is because the burdock seeds attach to the fox's fur for dispersal without harming or benefiting the fox, thus one species (burdock) benefits by spreading its seeds, while the other (fox) is neither helped nor harmed.

Question 18

Eukaryotic organisms are distinguished by their

Accepted Answer

Eukaryotic organisms are distinguished by having mitochondria, which are organelles responsible for producing energy through cellular respiration. This characteristic is not exclusive to any particular subset of eukaryotes and is found across a wide range of eukaryotic organisms, including animals, plants, fungi, and protists.

Question 19

Why are two species unable to share exactly the same niche?

Accepted Answer

The answer of Why are two species unable to share...

Question 20

How might the use of pesticides to control insects that feed on wheat affect how the insects evolve?

Accepted Answer

The answer of How might the use of pesticides to...

Quiz 1: Introduction: Ecology, Evolution, and the Scientific Method