ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is an antigen?

1. AA white blood cell that engulfs and digests bacteria
2. BA molecule that the immune system sees as foreign
3. CA protein that carries oxygen
4. DA drug that kills viruses

What is a scientific law?

1. AA statement of what always happens under certain conditions
2. BA rule that scientists vote to accept
3. CAn explanation that has been proven wrong
4. DA guess about the cause of something that has not yet been tested

Which feature helps a sperm cell carry out its job?

1. AA flagellum for swimming
2. BChloroplasts for making food
3. CA large vacuole for storing water
4. DA cell wall for protection

Identical twins raised in different homes have different body weights. What does this show?

1. ABody weight is controlled by a single gene
2. BMutations happened in every cell of one twin
3. CThe twins must have different genotypes for body weight genes
4. DThe phenotype depends on environment as well as genotype

كم صبغيًا تحوي بويضة بشرية طبيعية؟

1. A22
2. B23
3. C92
4. D46

Which DNA bases are purines?

1. AAdenine and thymine
2. BCytosine and guanine
3. CAdenine and guanine
4. DCytosine and thymine

ما السبب الأساسي للسرطان على المستوى الخلوي؟

1. Aتتوقف الخلايا عن الانقسام تمامًا وتموت
2. Bتفقد الخلايا كل ميتوكوندرياتها
3. Cطفرات في جينات دورة الخلية تسبب انقسامًا غير منضبط
4. Dتدخل بكتيريا إلى النواة وتستبدل DNA الخلية بالـ DNA الخاص بها

Two plants are crossed, and about half of the offspring show the dominant trait and half show the recessive trait. What are the most likely genotypes of the parents?

1. AHomozygous dominant × heterozygous
2. BHeterozygous × homozygous recessive
3. CHomozygous dominant × homozygous recessive
4. DHeterozygous × heterozygous