How is a cam plant suited to its environment?

The CAM ( Crassulacean acid metabolism) plants live under arid / very dry environmental conditions. These plants have got specialized adaptation to survive under such conditions. They perform CAM photosynthesis that enable them to conserve water.

They close their stomata during day time and open them during night time to take in carbon dioxide. This prevents water loss during daytime in such plants.

The carbondioxide is stored in vacuoles in the form of four carbon compound called malate.

It is then utilized during day time ( as malate is released out of vacuoles and breaks down to give carbon dioxide that can enter calvin cycle) for performing photosynthesis.

answer: c. two haploid cells

explanation:

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.