Human Reproduction — BIOLOGY STD 12 Science — Question

Name the part of the genital tract of human female which acts as ‘womb’.

Co-extinction and introduction of alien species too are responsible for the loss of biodiversity. Explain, how.

What are the fundamental difference between In-situ and Ex-situ conservation.

What do you understand by climax community?

1. Match the microbes listed under Column-A with the products mentioned under Column-B.

	Column-A		Column-B
(a)	Penicillium notatum	(i)	Statin
(b)	Trichoderma polysporum	(ii)	Ethanol
(c)	Monascus purpurea	(iii)	Antibiotic
(d)	Saccharomyces cerevisiae	(iv)	Cyclosporin-A

2. Why does ‘Swiss Cheese’ develop large holes?

With the revolution in information technology, now it has become an integral part of everybody's live, living in rural and urban India. You are asked to address the gathering of students of eco-clubs of your neighbourhood schools on generation and management of e-waste.

1. Write how e-waste is generated.
2. Explain how would you address the awareness issue of e-waste management amongst the students.
3. How have the developed countries exploited the developing countries with respect to e-waste managements?

If implementation of better techniques and new strategies are required to provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify the ban.

Write the location and function of the Sertoli cells in humans.

Differentiate between wind pollinated and insect pollinated flowers.

What are genetically modified organisms? Name two factors on which their behaviour depends.