تدريب عام: Unit 3 : Environments and Genetics (Science) - Preparatory 1 - Science

السؤال 1

What percentage of energy is typically transferred from one trophic level to the next in an energy pyramid?

1%

10%

90%

50%

السؤال 2

In the commensal relationship with the Nile crocodile, what does the Egyptian plover bird benefit from?

Access to the crocodile's prey.

Protection from predators by the crocodile.

Feeding on food remains between the crocodile's teeth.

A nesting site provided by the crocodile.

السؤال 3

What is the scientific field that studies the transmission of genetic traits from parents to offspring?

Anatomy

Genetics

Physiology

Ecology

السؤال 4

What is the role of producers in an ecosystem's energy flow?

They generate their own food and are the initial source of energy for other organisms.

They break down dead organic matter.

They consume other organisms for energy.

They regulate water cycles in the ecosystem.

السؤال 5

According to the one gene - one enzyme hypothesis, what is the role of a gene in expressing a hereditary trait?

Producing a specific enzyme that leads to protein formation.

Breaking down proteins into enzymes.

Storing excess enzymes for later use.

Directly forming the protein itself.

السؤال 6

Which of the following animals is an example of a carnivore?

Rabbit

Bear

Lion

Horse

السؤال 7

What is an example of a harmful mutation that specifically affects newborns?

Severe muscular dystrophy

Seedless fruits

Lactose tolerance

Changes in skin color for adaptation

السؤال 8

For what significant contribution is Gregor Mendel considered the founder of genetics?

Developing techniques for genetic engineering.

Identifying the components of chromosomes.

Discovering the double helix structure of DNA.

Concluding that each hereditary trait is controlled by a pair of genetic factors.

السؤال 9

What constitutes a biological community within an ecosystem?

A group of individuals of the same species in a specific place.

All living organisms and non-living components in an area.

A single living organism belonging to a specific species.

Various populations of different species inhabiting the same environment.

السؤال 10

What field of science has advanced significantly due to the foundational work of Gregor Mendel?

Planetary science.

Chemical synthesis.

Thermodynamics.

Genetic engineering.

السؤال 11

Which part connects the two chromatids of a chromosome?

The gene

The nucleotide

The histone

The centromere

السؤال 12

What is the direct outcome of a specific enzyme produced by a gene, leading to the expression of a hereditary trait?

Creation of a centromere

Breakdown of nucleotides

Formation of a protein

Replication of DNA

السؤال 13

What term describes the path of energy transfer in the form of food from one organism to another in an ecosystem?

Trophic level

Energy pyramid

Food web

Food chain

السؤال 14

What scientific hypothesis did Beadle and Tatum affirm regarding genes?

Central dogma of molecular biology

Cell theory

Theory of evolution by natural selection

One gene - one enzyme

السؤال 15

What percentage of energy is typically lost when moving from one trophic level to the next in an energy pyramid?

1%

10%

90%

50%

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تدريب عام: Unit 3 : Environments and Genetics (Science) - Preparatory 1