Question

1- Natural selection (pick all that apply)

Group of answer choices

is a random event

can fashion perfect organisms

consistently creates non-adaptive traits

interacts with chance and the environment

does not require genetic variation to generate adaptations in descedent populations

2- Genetic drift can result when a few individuals colonize a new habitat - this is called what?

Group of answer choices

the founder effect

gene flow

genetic bottleneck

artificial selection

3- All animals belong to this domain.

Group of answer choices

Eukarya

Bacteria

Prokarya

Animalia

4- Pick characteristic(s) that apply to ALL animals.

Group of answer choices

Multicellular

single celled

Eukaryotic

Prokaryotic

Heterotrphic

Autotrophic

have no cell walls

active movement in at least one stage of life

have specialized proteins like collagen

5- What is the type of symmetry where the left and right sides of the animal are mirror images?

Group of answer choices

Bilateral

Radial

Asymmetry

6- These are the most successful group of mollusks in terms of numbers and habitats occupied.
Group of answer choices

gastropods

cephalopods

bivalves

chitons

7- What do we mean by the trophic structure of an ecosystem?
Group of answer choices

the feeding relationships between organisms in the community.

the sum of all the globes ecosystems

a biome

the amount of bioaccumulation

8- The increasing concentration of persistent organic pollutants in organisms at each successive trophic level is referred to as what?
Group of answer choices

biological magnification

energy pyramids

food webs

feeding sickness

9- This type of terrestrial biome is a rainforest which is characterized by an abundance of evergreen trees. Several of these rainforests can be found here in Washington at Olympic National Park
Group of answer choices

temperate rainforest

tropical rainforest

tundra

temperate grasslands

Answer 1

1. Natural selection can create organisms that are most adaptive in that environment and fashions perfect organism but cannot create. It is not a random process it acts gradually on the genetic variations in a population and the ones with the most adaptive traits are survived. It interacts with chance and environment but requires genetic variation to act upon to reduce or increase the allele frequency but it cannot create any new traits. So the most suitable answers are:

can fashion perfect organisms

and

interacts with chance and the environment.

2.Founder effect is when a genetic drift that occurs when a group of organisms (founding population) move to another area from original population and colonize that area. The allelic frequency differs in this new population.

3. Archea, Bacteria and Eukarya are the three domains further classified into kingdoms. Protista, Fungi, Plantae and Animalia belong to the domain Eukarya as they all are eukaryotic organisms. The answer is Eukarya.

4. Animals are

multicellular,

eukaryotic,

heterotrophic (depend on other animals for food),

no cell wall (only cell membrane)

and

active movement in at least one stage of life have specialized proteins like collagen in the connective tissue.

5.Bilateral symmetry is an organization of body along a central axis that divides it into two identical halves on the left and right which look like mirror images. Animals like snails (body not the shell), fruit flies have this type of symmetry.

6. Gastropods constitute of about 80% of all the mollusks. They are the most successful class.

7. In an ecosystem, trophic structure is the organization of different organisms based on their energy intake from that ecosystem. Food webs, food chain and food pyramids are included in the trophic structure. Therefore, it is the feeding relationship between the organisms in the community.

8. As we move up the trophic structure the biomass is increased and therefore, the organic pollutants are also increased with each level. This refers to biomagnification.

9. Temperate rainforest is seen in places with mild temperatures and grow evergreen trees including conifers. Olympic National Park harbours the largest temperate forest.