(a) जिम्नोस्पर्म और एंजियोस्पर्म में दो अन्तर लिखिए।
(b)
उस फाइलम का नाम लिखिए, जिनमें निम्नलिखित गुणधर्म होते हैं
(i) काँटेदार त्वचा वाले प्राणी
(ii) यूकेरियोटिक, एककोशिकीय सूक्ष्म जीव (ससीमकेन्द्रक)
(iii) खंडयुक्त शरीर और जुड़े हुए पैर सहित संयुक्त नेत्र
(iv) कोमल शरीर पर कवच और उदर पाद
द्विनाम पद्धति को किस वैज्ञानिक ने प्रस्तावित किया था?
(c)

What greek scientist created a screw to move water for irrigation?

Most sociologists agree that: a. culture is central in shaping gender roles, but only in preliterate societies. b. biological factors have some influence, but cultural factors are more important determinants of gender roles. c. biological factors are influential in determining gender roles, but only in industrial or complex societies. d. biological factors only explain differences between men and women with regard to aggression and disease. e. there is no difference between the influences of culture or biology on the development of gender roles, as they are unpredictable.

Refers to the biological heritage people use to identify themselves.