LE Review

Genetic recombination, production of more offspring than can survive, and struggling with the challenges of the environment are all concepts associated with

• natural selection

• mitotic division

• selective breeding

• genetic engineering

A rich variety of genetic material in an ecosystem will

• reduce the biodiversity of the ecosystem

• decrease the carrying capacity of the ecosystem

• reduce the likelihood of future medical discoveries

• increase the chances that some organisms will survive change

A single pair of goldfish in an aquarium produced a large number of offspring. These offspring showed variations in body shape and coloration. The most likely explanation for these variations is that the

• offspring were adapting to different environments

• offspring were produced from different combinations of genes

• parent fish had not been exposed to mutagenic agents

• parent fish had not reproduced sexually

Natural selection produces most quickly in

• species with short reproductive cycles

• individual pathogens killed by antibiotics

• complex multicellular organisms

• individuals that produce a small number of offspring

Which sequence best represents the levels of organization in a paramecium, a single-celled organism?

• cells —› tissues —› organs —› organ systems —› organism

• organelles —› organ systems —› organism

• cells —› organs —› organ systems —› organism

• organelles —› organism

The human immune system fights infections by releasing

• ATPs

• antibiotics

• antibodies

• antigens

What is the difference between biotic and abiotic?

• Biotic factors are consumers, abiotic factors are producers

• Biotic factors are living, abiotic factors are non-living.

• Abiotic factors are living, biotic factors are non-living.

• There is no difference

Tags

NGSS.MS-LS2-3

Name the two producers in this food web

• Seaweed and Phytoplankton

• Phytoplankton and Zooplankton

• Seaweed and Krill

• Fish and Zooplankton

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The process of change in the living parts of the ecosystem

• climax community

• ecological succession

• primary succession

• pioneer species.

Which sequence best represents sexual reproduction?

• meiosis, gametes, fertilization, zygote

• mitosis, gametes, zygote, fertilization

• gametes, meiosis, mitosis, fertilization

• fertilization, gametes, meiosis, zygote