📚 مادة الاختبار: Science — Preparatory 1
تدريب عام: Unit 3 : Environments and Genetics (Science) - Preparatory 1
سؤال من
السؤال 1
The production of seedless fruits is a natural mutation.
السؤال 2
What two main components chemically compose a chromosome?
السؤال 3
How many chromosomes are typically found in the somatic cells of a human?
السؤال 4
What does an ecosystem consist of?
السؤال 5
What percentage of energy is typically transferred from one trophic level to the next in an energy pyramid?
السؤال 6
What hypothesis did scientists Beadle and Tatum affirm regarding genes?
السؤال 7
Which hypothesis did scientists Beadle and Tatum affirm through their experiments?
السؤال 8
What is the role of producers in an ecosystem's energy flow?
السؤال 9
What term describes a change in the nature of a gene, such as an alteration in the arrangement of its nucleotides, leading to a new trait?
السؤال 10
What is the direct result of nitrogen fixation carried out by root nodular bacteria?
السؤال 11
In a commensal relationship, how do the two organisms involved interact?
السؤال 12
The birth of an albino child to a dark-skinned mother is an example of an induced mutation.
السؤال 13
What is the primary role of decomposers like bacteria and fungi in an ecosystem?
السؤال 14
Which of the following is an example of a hereditary trait?
السؤال 15