STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Statement I: In general, viruses that infect plants have single stranded RNA.
Statement II: Viruses that infect animals have either single or double stranded RNA or double stranded DNA.

Pith is a central part of the ground

Which of the following are not correct ?
(i) Oxygen helps in releasing metabolic energy essential for growth activities.
(ii) Nutrients are required by plants for the synthesis of protoplasm and act as source of energy.
(iii) Light and gravity affect certain stages of growth.
(iv) Water oxidizes glucose to provide energy
(v) Long day plants flower if the night length shorter than a critical period.
(vi) Short-day plants flower when night length exceeds a critical dark period.
(vii) The process of flowering does not occur in dayneutral plants.
(viii) 17,500 new cells are produced per hour by a single maize root apical meristem.
(ix) With the help of length, growth of pollen tube is measured.
(x) The growth of the leaf is measured in terms of volume.
(xi) Cells in a watermelon may increase in size by upto 3,50,000 times.
Choose the correct option given below :-

Polyribosomes are aggregation of

Which sentence is given by Julius Von Sachs ?

Griffith have performed series of experiments on

An example of agarophyte is

Vegetable eating person acts as

Mark the given statements True (T) or False (F).
(i) Aristotle was the earliest scientist to attempt a more scientific basis for classification. He used complex morphological characters to classify plants into trees. shrubs and herbs.
(ii) Fungi have cellulose in their walls while green plants have chitin in cell wall.
(iii) According to five kingdom of classification, the unicellular prokaryotic organisms were placed in kingdom protista.
(iv) The classification system is not only based on morphological, physiological and reproductive similarities, but is also phylogenetic ie. is based on evolutionary relationships.
(v) Methanogens are present in the gut of several ruminant animals such as cows and buffaloes and they are responsible for the production of methane from the dung of these animals.
(vi) In Nostoc, site of oxygen fixation is heterocysts.
(vii) Cholera, tetanus, citrus canker are well known diseases caused by different bacteria.
(viii) Bacteria reproduce mainly by fission.
(ix) The mycoplasma are organisms that completely lack a cell wall. They are smallest living cells known and can survive without oxygen.
(x) Chrysophytes, Euglenoids and Slime moulds belong to kingdom protista.
Choose the correct option given below : -