ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is a trait that is controlled by many genes called?

1. AA codominant trait
2. BA sex-linked trait
3. CA recessive trait
4. DA polygenic trait

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. ALigase
2. BLipase
3. CAmylase
4. DHelicase

في أي عُضيّة تحدث عملية البناء الضوئي؟

1. Aالبلاستيدة الخضراء
2. Bجهاز غولجي
3. Cالنواة
4. Dالميتوكوندريا

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt makes RNA from the host's DNA
2. BIt makes proteins from the virus's DNA
3. CIt makes DNA from the virus's RNA
4. DIt breaks down the host's ribosomes

Why do many plants close their stomata on hot, dry days?

1. ATo take in more carbon dioxide
2. BTo speed up photosynthesis
3. CTo release more oxygen
4. DTo reduce water loss

A bone marrow transplant can treat some blood cancers. Why does it work?

1. AThe transplant replaces the patient's bones
2. BThe donor marrow contains antibiotics that kill cancer
3. CThe donor red cells divide to make more red cells
4. DThe donor stem cells produce new, healthy blood cells

أيّ مما يلي فرضية قابلة للاختبار؟

1. Aإذا تلقت النباتات ضوءًا أكثر فستنمو أطول
2. Bينبغي أن يسقي النباتاتِ أناسٌ يعتنون بها
3. Cالنباتات أجمل الكائنات الحية
4. Dتشعر النباتات بسعادة وهدوء أكبر حين يتحدث الناس إليها كل يوم

A pesticide that is not broken down is sprayed on crops. Later, hawks at the top of the food chain have much higher levels of it than the insects. Why?

1. AHawks eat the crops directly, so they take in the most pesticide of all
2. BHawks make the pesticide in their own bodies
3. CEach predator eats many prey, so the pesticide builds up at each level
4. DThe pesticide is broken down faster in insects than in plants