نموذج امتحان في العلوم المتكاملة للصف السادس انسبير - الفصل الثالث (2)

Science Department

Mock Exam Term 3 - 2023/2024

Grade: 6 General

School Name: Al Foal 1398

15 Questions- Multiple choice

Part 1

Q1. All of the following are advantages of asexual reproduction EXCEPT

a. the population can increase rapidly b. only one parent is needed c. less time and energy as you don't need a mate d. Harmful mutation will be passed asexually reproduced offspring Q2. Hydras are organisms that live in freshwater environments. They have a tubelike body, and a mouth are stinging tentacles that help to capture food. Depending on the conditions, hydras can reproduce sexually or asexually.

Based on your observations, which statement best explains what is happening to the hydra in the figure above?

a. The hydra is reproducing asexually by budding a new hydra b. The hydra is reproducing asexually by splitting in two c. The hydra is reproducing sexually by grafting to another hydra d. The hydra is reproducing asexually by releasing sex cells into the water Q3. The joining of an egg cell and a sperm cell is called .......

a. stability b. adaptation c. asexual reproduction d. fertilization

Q4. Which of the following best describes the cause-and-effect relationship between courtship behaviors and successful reproduction?

a. Courtship behaviors protect the offspring, and all offspring can reproduce b. Courtship behaviors help animals find mates which can lead to successful reproduction c. Courtship behaviors help animals survive in their environment long enough to reproduce d. Courtship behaviors help animals to compete physically with same species. Q5. The growth of a plant toward or away from light.

a. thigmatropism b. phototropism c. gravitropism d. hydrotropism Q6. A tree produces seeds in pods when wind-born pollen from another tree of the same species reaches the flowers. Each seed contains genetic information so the seed can grow into an adult tree. Which do you predict would be the effect of this process?

a. The tree produces a large number of genetically diverse offspring b. The tree produces a large number of genetically identical offspring c. The tree produces a small number of offspring that are identical to the female parent d. The tree produces a small number of offspring that are identical to the male parent

Q7. which of the following is Not an environmental factor that would affect the hamster’s growth?

a. the amount of food that hamster is given b. Gene for fur color c. the amount of time spent on the exercise wheel d. Interactions with other hamsters Q8. In order to attract a mate, some animals such as the white female gypsy moth shown in the picture release chemical substance called ..........................

a. Pheromones b. perfume c. Phenomena d. Physical Q9. In the figure below, the trait of the thumbs might be expressed as curved or straight. How a trait appears or is expressed is the trait’s ................................

a. Phenotype b. Genotype c. Genes d. Alleles

Q10. The pie chart below shows the proportion of different sources of ocean pollution caused by humans. Which source shows the highest amount of pollution?

a. Airborne pollutants on land b. Dumping trash into the ocean c. Offshore mining and drilling d. Runoff from land Q11. Compare the ozone layer in 1979 (left) to the ozone layer in 2016 (right)

Which of the following reduces the ozone layer in the upper atmosphere? a. Photochemical smog b. CFCs c. Acid precipitation d. Volcanic eruption Q12. The image below shows a forest that was removed. Which of the following is Not an impact of deforestation?

a. Endangerment or Extinction of a species b. Loss of animal habitats c. Rate of photosynthesis Increase d. more carbon dioxide remains in the atmosphere

Q13. Which one protect the developing seed in nonflowering plants?

a. anther b. cone c. sepal d. pistil Q14. The Great Pacific Garbage Patch is a large area of floating trash in the Pacific Ocean that is caused, in part, by ocean currents. Which is a step people can take to minimize its effect on Earth's water?

a. use satellites to measure its size b. measure ocean currents to predict where it will go c. design new and better ways to recycle d. work harder to prevent oil spills. Q15. Which is NOT a result of acid precipitation?

a. It can harm fish and other organisms. b. It can pollute soil killing trees and other plants. c. It can increase the chance of asthma attacks. d. It can damage buildings and statues made of some types of rocks.

5 Questions- Written questions

Part 2

Q1. write down each pictures the environmental factors that affect how plants grow (using one of this factors) and

Phototropism – thigmotropism - gravitropism 1.a

__________________The response of a plant to touch

1.b ___________________ The response of a plant to gravity

1.c __________________The response of a plant to light

Q2. The table below shows the possible phenotypes and genotypes for both round and wrinkled seeds.

2.a complete the above table by the correct genotypes.

2.b Across between two heterozygous pea plants with round seed produced 5,474 round seeds and 1,850 wrinkled seeds. What is the ratio of round to wrinkled seeds?

Q3. Use the punnett square below to complete a cross between a female fruit fly with straight wings (bb) and a male fruit fly with curly wings (BB)

BB bb

3a. what phenotypes are possible for the offspring of the cross? 3b. what are the genotypes of the offspring? 3c. what is the ratio of offspring that will have curly wings to straight wings?