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WorksheetsBenchmark Review
Total questions: 85
Worksheet time: 2hrs 30mins
Some dairy farmers want to increase the amount of milk produced by their cows. How can the farmers use selective breeding to increase milk production?
Increase the age of the cows that are bred
By choosing cows that are high milk producers
By limited the number of offspring per cow
By choosing cows that can produce milk after eating the most food.
Wild Soay sheep live in a cold environment on a small Scottish island. The sheep used to be large because they gained extra weight during the summers in order to survive the harsh winters. A recent change in climate has caused grass to be available for a longer period each year, so survival conditions for the sheep have become less challenging. Researchers who study these sheep most likely observed a decrease in the wild Soay’s ________.
Size
Life Expectancy
Reproduction Rate
Body temperature
Certain species of whiptail lizards have only female individuals and no males. These lizards reproduce asexually. What is one disadvantage of asexual reproduction for these lizards?
A new population can be established by a single individual in a relatively short period of time.
All the members of a population are genetically very similar and less able to survive environment changes.
They are smaller than lizards that reproduce sexually.
They are more likely to develop a variety of tail lengths.
Which best explains biodiversity?
The population of a species in an ecosystem
The variety of species in an ecosystem
The study of life
The difference number of biomes on Earth
Which of the following situations contributes to stability in an ecosystem?
increase in biodiversity
decrease in biodiversity
extinction of a population from the ecosystem
removal of many populations of organisms
What are three things that create biodiversity?
species, genetic variation, and ecosystem
mutation, disorder, regression
genes, cells, traits
water, land, mountains
Why does biodiversity contribute to a habitat’s sustainability?
The more plants and animals in a habitat, the greater the biomass, which is how habitats store energy.
The greater the number of species, the more competition there is for food between predators, which sustains their populations.
Changing conditions that harm one species leave other species to survive and perhaps even thrive.
Landforms change shape less frequently when there is a greater number of species using the land.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
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A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
