Q3 of 30 Page 1

What is ‘saltation’ according to de Vries?

According to de Vries speciation is caused by mutation and hence called it saltation that is a single step large mutation.


Explanation:


Hugo de Varies theory-


• He believed that it is mutation which causes evolution.


• Large differences arising suddenly in a population.


More from this chapter

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1

Write the two pre-fertilization events from the list given below: Syngamy, Gametogenesis, Embryogenesis, Pollination

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Name an IUD that you would recommend to promote the cervix hostility to the sperms.

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Identify the two correct statements from the following:

(i) Apiculture means apical meristem culture.


(ii) Spinach is iron-enriched.


(iii) Green revolution has resulted in improved pulse-yields.


(iv) Aphids cannot infest rapeseed mustard.


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A boy has been diagnosed with ADA-deficiency. Suggest any one possible treatment.