Secondary growth of stems is very common in

A. dicots and conifers
B. monocots and conifers
C. nonvascular plants
D. flowering plants


Ans: A. dicots and conifers

Biology & Microbiology

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Which of the following is the correct order of the levels of DNA packaging in eukaryotic chromosomes?

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One reason that malaria continues to be the world's most significant infectious disease is because Plasmodium falciparum continues to develop resistance to the drugs that have been used to treat malaria. Which of the following is the contributing factor to its resistance?

A. The antimalarial drugs cause mutations to occur in the mosquito. B. Some Plasmodium falciparum have preexisting mutations that make them resistant to antimalarial drugs. C. Some mosquitoes have preexisting mutations that make them resistant to antimalarial drugs. D. The antimalarial drugs cause mutations to occur in Plasmodium falciparum. E. Some people have preexisting mutations that make them resistant to antimalarial drugs.

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Patterns of species migrations, such as birds that nest in North America during the spring and in South America during the winter, do not alter seasonal patterns of regional diversity for a wide range of taxonomic groups

Indicate whether the statement is true or false

Biology & Microbiology

An advantage of sexual reproduction is to ____ among offspring. 

A. produce new gene combinations B. reduce genetic diversity C. introduce new genes into a species D. None of the choices is correct.

Biology & Microbiology