Asexual and Sexual Reproduction in Plants — BIO BOTANY STD 12 — Question

What is perisperm? Give example.

What are Holoparasites? Give example.

Heliophytes differ from Sciophytes. How?

Which are our National fruit and State tree of Tamil Nadu?

Name any 3 auto tetraploids and one natural autotriploid plant species.

Recently in January 2019, our Tamil Nadu Government had imposed a ban on using 14 different products of plastic origin. Mention any six plastic products that you know.

Explain the term Carbon sink.

Define Grey carbon and Black carbon.

Mention any two vital biomolecules that requires phosphorous for their biosynthesis.

Given below is a sequence of alphabets representing the genes of the chromosome. Observe it and answer the questions.
A-B-C-D-E-F-G-H-I-J-K.
(a) Write the sequence of genes after the chromosome undergoes terminal deletion of a single gene.
(b) What will be the gene sequence, if the genes E and F undergo tandem duplication?
(c) Consider the centromere is located between the genes F and G and write a gene sequence after paracentric inversion occurs in between the genes C, D, and E.