Unit 7 Honors Review

An anteater has specialized cells that group together to perform functions, such as movement and obtaining food. This is characteristic of a multicellular organism.

• Both unicellular and multicellular organisms can have structures to allow for movement.

• Both unicellular and multicellular organisms can obtain energy by consuming food.

• An anteater has specialized cells that group together to perform functions, such as movement and obtaining food. This is characteristic of a multicellular organism.

• Both unicellular and multicellular organisms can reproduce.

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The trees with needle-like leaves were able to survive the changes to the environment. This was an advantage to the survival of the population.

• The paragraph states that conifer trees have survived, and most have the variation of needle-like leaves.

• Although it is true that this variation helped survival, there is no evidence in the paragraph that supports both types of trees increasing at a high rate.

• The trees with needle-like leaves were able to survive the changes to the environment. This was an advantage to the survival of the population.

• The variation of needle-like leaves did affect the survival of trees, which is supported by the evidence that most modern conifers have this adaptation.

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Heterotrophs are consumers, and herbivores are consumers that feed on producers, or autotrophs. The farmer likely saw an herbivore eating plants.

• Although it is true that heterotrophs are consumers, this consumer would be an herbivore because autotrophs are mostly plants.

• Autotrophs make their own food from sunlight, air, and water, not heterotrophs.

• Heterotrophs can consume other heterotrophs or autotrophs.

• Heterotrophs are consumers, and herbivores are consumers that feed on producers, or autotrophs. The farmer likely saw an herbivore eating plants.

Observations about several different living things are shown in this table. Identify AND explain the part of cell theory that the data from the table supports.

• The table shows the first part of cell theory which states that all living things are made up of one or more cells. This means that if something is living, it is always made up of one cell or multiple cells.

• The table shows the second part of cell theory which states that all new cells come from preexisting cells. This means that cells divide to form new cells.

• The table shows the third part of cell theory which states that cells are the basic unit of structure and function. This means that cells are the building block of life for every organism, and each part of the cell has a function.

• The table shows some observations about living things, but it does not clearly show a part of cell theory.

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Mouth size is a variation that occurs in a fish population. Some fish have larger mouths than other fish of the same species, which allows them to swallow larger prey. Suppose a sudden change to the ecosystem causes a food shortage where a population of fish lives. Which statement BEST describes how the variation in this group of fish could affect the survival of the population during this food shortage?

• These fish would eat less food and would not survive the food shortage. This would help more fish from the population to survive.

• These fish could eat either big or small food to survive the food shortage. Their survival would impact the overall survival of the population.

• These fish could switch from swallowing prey to filter-feeding on producers. This would help more fish from the population to survive.

• These fish could eat big or small food to survive the food shortage. Their survival would have no impact on the overall survival of the population.

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Many different scientists throughout history contributed their discoveries in order to develop the components of cell theory. What is one significant discovery that a scientist or group of scientists made in history, AND how does this discovery relate to one of the components of cell theory today? Think about the question carefully. Then record your answer in the box provided.

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An anteater lives in a tropical rainforest along with many other organisms. Among the organisms that live in the ecosystem, several are multicellular, including the anteater. Identify a characteristic of the anteater that is only true of multicellular organisms.

• An anteater has structures to allow movement in its environment.

• An anteater has the ability to obtain energy by consuming food.

• An anteater has specialized cells that perform specific functions in groups.

• An anteater has the ability to reproduce.

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Almost all cone-bearing trees found today, the conifers, have small, needle-like leaves that are beneficial for conserving water. Only a handful of modern species in this group have wide leaves. However, the early ancestors of all conifers had large, wide leaves. Scientists believe that needle-like leaves were a variation. Evidence suggests that changes in the environment caused the variation from wide leaves to needle-like leaves in conifers. Which statement BEST describes the effect the variation of needle-like leaves had on the survival of the population of conifer trees as the environment changed?

• The variation was a disadvantage to survival. There are no more conifer trees.

• The variation was an advantage to survival. Both types of trees survived and multiplied at a high rate.

• The variation was an advantage to survival. More trees with needle-like leaves survived the environmental changes.

• The variation had no effect on survival. Conifer trees survived and adapted due to other factors.

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A farmer claims to have seen a heterotroph eating an autotroph on his farm. Is it possible that the farmer saw this? Why or why not?

• This is possible because heterotrophs are consumers, and this heterotroph is a carnivore.

• This is not possible because a heterotroph makes its own food from sunlight, air, and water.

• This is not possible because heterotrophs are all consumers that only eat other heterotrophs.

• This is possible because heterotrophs are consumers, and this heterotroph is an herbivore.

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Based on the data in the table, what type of cells did the scientists MOST LIKELY see?

• The cells are most likely eukaryotic.

• The cells are most likely prokaryotic.

• The cells could be both prokaryotic and eukaryotic.

• There is not enough information to identify the cells.

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