JLab Exam Questions and Answers 100% Pass

JLab Exam Questions and Answers 100% Pass The diagram shows a simple food web of organisms on a forest floor. Which of these is most dependent on the earthworm for its food supply? - centipede In this plant cell, which cellular structure is responsible for storing food, water, and wastes? - vacuole In the scale model above, one centimeter is equal to one-half of a meter. The mailbox is two truck lengths away from the model truck. How far away is the mailbox from the truck on the real street? - 10 Meters Asexual reproduction involves only one parent. The offspring of this type of reproduction have - - DNA identical to the DNA of the parent The picture shows the growth curve of a bacterial population. According to this information, the bacterial population doubles every - - 20 Minutes This experiment was set up to test the hypothesis that plants grow faster in green light. What is the independent variable in this experiment? - color of light The function of a cell nucleus is to - - direct the activities of the cell What is the mass of the rock? - 354.6 g At which of these points is it 12:00 noon? - 4 According to this diagram, both of these fish - - get their energy from other animals 2© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED A plant's green color is due to the presence of which organelle? - Chloroplast Cells → Tissues → Organs → ? - Systems The force that holds the planets in orbit around the sun is called - - gravity Which of the following classification groups contains organisms that have the most characteristics in common? - Species After fishing in the ocean, a student left his fishing gear in the sun to dry. Later, he noticed that small white crystals had formed on the rod, reel, and fishing line. Which of these is the best explanation of what occurred? - The water evaporated from the fishing gear, and salt from the ocean was left behind. Which of these shows the correct sequence of development? - Cells → tissues → organs → systems Black bears roam over large territories. What effect would building shopping centers in these territories have on the bears? - Reduce the black bears' habitat White-footed mice having thicker fur than cactus mice is probably influenced most by the differences in the - - environmental climates where they live Which of these is a way that a person can help improve air quality? - Carpool with several people Based on the position of the wings, which of the insects below is most likely in the order Hemiptera? - (they are images but it is the one that resembles a beetle) How should the fruit above be classified? - Drupe Artificial lights can create a great deal of heat. If a gardener wanted to grow seedlings indoors that grow best at 25°C, which light intensity should be used? - 60 candelas 3© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED The Earth makes a complete rotation once every 24 hours. Which of these would best illustrate rotation? - Coin Spinning A student wishes to measure the mass of an object. Which instrument would be most useful? - Triple beam balance Of the following, which is the correct progression in the food chain? - Producers → herbivores → carnivores One way plants and animals are alike is that they both - - use oxygen The loss of which of these would have the least effect on the water cycle? - Animals Which of these species would be most in danger of becoming extinct if one of their food sources became unavailable? - Panda The quality of air is monitored by the government to determine whether a city needs to take steps to control air pollution. To best measure air quality,