Worksheets7th Grade Life Science
Total questions: 13
Worksheet time: 7mins
Budding is a form of asexual reproduction that plants can undergo. The bud (new plant) grows as an extension from the parent plant. Eventually the new piece breaks off and becomes an independent plant. What process do the organism's cells undergo during reproduction?
mitosis
haploid
meiosis
diploid
What is the role of the mouse in the food web?
it is a consumer that provides energy to other consumers
it is a decomposer that provides energy to producers
it is a producer that provides energy to other producers
it is a producer that provides energy to consumers
A species of baby sea turtle is known to hatch on sandy beaches and walk towards a light source found in the ocean (moon's reflection). However, many of them hatch and walk towards a light source that may be houses or street lights. Which statement best relates this scenario to Darwin's theory of evolution of natural selection?
the population of sea turtles will not be affected as long as some of them reach the ocean
the turtles that continue to follow the light source toward the ocean will have a better chance of surviving to reproduce
baby turtles are the superior members of the species because they have many advantages over adult turtles
natural selection will gradually eliminate baby turtles altogether
The Tyrannosaurus rex is most closely related to chickens and ostriches. None of them can fly, but they all lay eggs. The T-rex was found to have teeth while the chicken and ostrich does not. What best explains this difference?
the all have different traits because their ancestors did not have teeth.
none of these animals have teeth because they are not mammals
teeth are a trait that come from having two recessive genes
the environment of the ostrich and chicken ancestor favored organisms without teeth
Green anoles are native to Florida, prefer to live on low branches of trees because the higher branches are thinner and have slippery leaves. Brown anoles are an invasive species that were introduced to the habitat or the green anoles. Brown anoles also live on low branches. Within months, the green anoles abandon the lower branches, moving to the higher branches of the trees. Which most likely describes what has happened to the green anoles over time.
climate change caused characteristics of the tree leaves to change so they were not slippery
they used their green color to blend in with the leaves at the top of trees
an adaptation allowed them to hold on to the slippery leaves at the top of trees
the changed their diet and no longer needed to live near the bottom of the tree near the ground
The endangered Key deer is the smallest deer in North America. They live on the Florida Keys, where they eat the thatch palm berries found on the islands that they swim between. If climate change were to raise sea levels, what best describes this effect on the Key deer located at the National Key Deer Refuge on Big Pine Key?
The animals would be stranded on separate islands
They would have to migrate to Florida's mainland
saltwater would kill the plants, leaving less food for the deer
the deer would need to adapt to drink salty water
Delilah notices a tick on her dog. What relationship is most similar to that of the tick and the dog?
predation is similar to parasitism because one animal is benefiting by living off another animal that is harmed
commensalism is similar to parasitism because neither animal is harmed by its relationship with the other
mutualism is similar to parasitism because both animals in the relationship need each other to stay alive
competition is similar to parasitism because one animal is preventing another animal from living off the same prey
The anatomy of a dolphin provides evidence that they share a common ancestor with an animal that lived on land millions of years ago. Based on the fact that the dolphin has a pelvis, what might you expect to see if you analyzed a fossil of an ancestor of a dolphin?
evidence that the ancestor made sounds
evidence that the ancestor had arms
evidence that the ancestor had legs
evidence that the ancestor had feet
What is most likely the reason that dolphin's land dwelling ancestors evolved to live in the water?
to reduce competition with organisms for food
to use a blow hole
to develop aquatic feathers like flippers
to participate in the annual migration of the species
Nate makes the following model of a food web in an ecosystem for class. Which best identifies a limitation in this model?
it shows relationships that cannot be observed directly
it summarizes information so it can easily be analyzed
it simplifies feeding relationships so some details are not included
it allows patterns in an ecosystem to be identified
In a certain type of plant, the allele for purple flowers (P) is dominant and the allele for pink flowers (p) is recessive. Plant 1 (Pp) and Plant 2 (Pp) are both heterozygous for the color of their flowers. Use the Punnett square to decide what colors are the flowers on the parent plants.
pink and purple
purple
pink
In a certain type of plant, the allele for purple flowers (P) is dominant and the allele for pink flowers (p) is recessive. Plant 1 (Pp) and Plant 2 (Pp) are both heterozygous for the color of their flowers. What is the probability that the plants will produce pink offspring?
100%
50%
25%
Which of the following would cause one of the systems in the model to be disrupted?
there is a blockage between the stomach and the small intestine
a person cannot taste the flavor of their food
the digestive tract splits into small and large intestines
a person has an allergy to certain food products, like peanuts
