محاضرة علم الأحياء الخلوي: مستوى تنظيم الخلية

64 سم مكعب

تتطلب نسبة السطح إلى الحجم أن تكون الخلايا صغيرة لأن زيادة حجم الخلية يؤدي إلى انخفاض نسبة السطح إلى الحجم.

384 سم مربع

6:1

تحتوي الخلايا النواة الحقيقية على: البنى الخلوية (الميتوكوندريا، الجهاز الجولجي، الشبكة الإندوبلازمية، النواة).

Human Biology is the scientific study of human beings and populations from a biological point of view, including aspects such as evolution, genetics, ecology, anatomy and physiology, development, and nutrition.

All living organisms share several basic characteristics: (1) they are organized, (2) acquire materials and energy, (3) are homeostatic, (4) respond to stimuli, (5) reproduce and grow and develop.

The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

A molecule is the union of two or more atoms of the same or different elements. It is composed of electrons, protons, and neutrons.

The characteristics of life mentioned in the text include the use of energy, organization, acquisition of materials and energy, homeostasis, response to stimuli, and reproduction with growth and development.