ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is true of a recessive allele?

1. AIt is always harmful to the organism
2. BIts trait shows only when two copies are present
3. CIts trait shows whenever one copy is present
4. DIt is found only on the X chromosome

What is a pathogen?

1. AA medicine that kills bacteria
2. BA microorganism or agent that causes disease
3. CA harmless microbe living on the skin
4. DA cell of the immune system that fights infection

What is a decomposer?

1. AAn organism that breaks down dead material
2. BAn animal that hunts other animals
3. CAn organism that makes food from sunlight
4. DAn animal that eats only plants

ما الذي يعطي الشبكة الإندوبلازمية الخشنة مظهرها "الخشن"؟

1. Aالبلاستيدات الخضراء داخل أغشيتها
2. Bالقطيرات الدهنية المخزَّنة على سطحها
3. Cالجسيمات الحالّة المندمجة بجانبها الخارجي
4. Dالريبوسومات المرتبطة بسطحها

Why do root hair cells have long, thin extensions?

1. ATo anchor the plant firmly against strong winds and rain
2. BTo store starch for the winter
3. CTo increase the surface area for absorbing water
4. DTo carry out photosynthesis underground

Why is water good at dissolving salts and sugars?

1. AIts molecules are nonpolar
2. BIt contains carbon atoms
3. CIt has a very low boiling point
4. DIts molecules are polar

A large molecule contains carbon, hydrogen, oxygen, nitrogen and phosphorus. Its monomers each have a sugar and a base. What type of molecule is it?

1. AA carbohydrate
2. BA lipid
3. CA nucleic acid
4. DA protein

Bacteria in a closed flask grow quickly at first, but the population then stops increasing. What is the main reason?

1. AThe bacteria change into viruses after many divisions
2. BNutrients run out and waste products build up
3. CThe flask becomes too cold for growth
4. DThe bacteria stop dividing once they reach adult size