Kingdom Animalia — Biology STD 11 Science — Question

The usage of binomial names, for plant species was accepted by all after the publication of the work by :

The leaves without petiole are called

Central nervous system consists of

Invertebrates, bony fishes, tadpoles, etc. are ammonotelic. Whereas birds, reptiles, land snails, etc. are uricotelic. What would be the probable reason for the difference in mode of excretion?
i. Ammonotelic organisms conserve water as conversion of ammonia to uric acid requires large amount of water.
ii. Elimination of ammonia requires large quantity of water, thus ammonotelism is seen in aquatic animals.
iii. Uricotelic organisms require moderate water for eliminating urea and formation of ammonia requires expenditure of energy. Thus, to conserve water and energy, these animals have uricotelism mode of excretion.
iv. Aquatic animals can retain ammonia and store it in the body for long time.

Which of the following is not an accessory pigment?

Identify the CORRECT statements.
1. Nerve cells are the longest cells.
2. The concept ‘Omnis cellula-e-cellulla’ was explained by Rudolf Virchow.
3. The cell theory was proposed by Nicolson and Singer.

Alpha diversity is biodiversity present :

Identify the INCORRECT statements from the following.
1. Lysosomal enzymes do not digest their own membrane proteins.
2. Accidental release of lysosomal enzymes in limited amount does not harm the cell because pH of cytosol is near neutral.
3. Any insufficiency in secretion of lysosomal enzymes leads to disorders e.g. in genetic disorder- Klinefelter syndrome.
iv. Due to insufficiency of protease brain gets impaired resulting from accumulation of fats.

A cell that lacks chloroplast does not

Placentation in which ovules develop on the inner wall of the ovary or in peripheral part is: