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Organism produced from two parents is an example of:

After pollination, the growth of pollen tube on stigma toward ovule is due to:

The gonadotropin releasing hormone (GnRH) released by the _____(i)_____stimulates the ___(ii)______ to release ___(iii)______ and _____(iv)______. The LH stimulates the Leydig cells to produce____(v)______.

what is natural selection?

Question 23

Which of the following is not an involuntary action?



(a) Vomiting

(b) Salivation

(c) Heart beat

(d) Chewing

Photorespiration is favoured by

Question 8 (b)
Tick the correct answer:
(b) The plant which traps and feeds on insects is:
(i) Cuscuta (ii) china rose (iv) pitcher plant (v) rose

Question 3

Read the different combinations of terms given below:



(a) cell wall, cell membrane, nucleus, plastid

(b) cell wall, nucleus, ribosome, chromosome

(c) cell membrane, mitochondria, ribosome, chromosome

(d) cell membrane, ribosome, mitochondria, chloroplast



The correct combination of terms with reference to an animal cell is ___.

Match the following.
$\begin{array}{cc}\text{a) Pepsinogen is secreted by}& \text{I)Liver}\\ \text{b) Trypsin is secreted by}& \text{II) Pancreas}\\ \text{c) Bile is produced in}& \text{III) Gall bladder}\\ \text{d) Bile is stored in}& \text{IV) Gastric glands}\end{array}$

Vegetative propagation in bryophyllum takes place through________.

Question 38

Label the parts of a neuron in the figure

____ helps in the protection of gastric mucosa from hydrochloric acid.

What do analogous organs indicate?

When brain cells are starved of oxygen, it can lead to ____.

A common structural feature of vessel elements and sieve tube elements is

The immature male germ cell undergoes division to produce sperms by the process of spermatogenesis. Choose the correct statement with reference to above.

During which stage of Prophase I, does the crossing over takes place ?

One of the following gives the correct sequence of the components in a reflex arc. This is :

(a) Receptors $\to$ Muscle $\to$ Sensory neuron $\to$ Motor neuron $\to$ Spinal cord

(b) Receptors $\to$ Motor neuron $\to$ Spinal cord $\to$ Sensory neuron $\to$ Muscle

(c) Receptors $\to$ Spinal cord $\to$ Sensory neuron $\to$ Motor neuron $\to$ Muscle

(d) Receptors $\to$ Sensory neuron $\to$ Spinal cord $\to$ Motor neuron $\to$ Muscle

Multiple fission occurs in_______.

Reptiles with 10 pairs of cranial nerves:

What are the ‘tokens’ that the poet says he may have dropped long ago, and which the animals have kept for him? Discuss this in class.(Hint: Whitman belongs to the Romantic tradition that includes Rousseau and Wordsworth, which holds that civilisation has made humans false to their own true nature. What could be the basic aspects of our nature as living beings that humans choose to ignore or deny?

What is a vacuole? Write its two functions?

What is cleaning of water? What would happen if oils and fats are released into a water body?
[2 MARKS]

Which of the following can reproduce through the sexual mode of reproduction?

Match the parts of the Nephron.

Match the following with repect to glands and disease

$$\begin{array}{cc}\text{A. Addison's ~ disease}& \text{1. Pituitary}\\ \text{B. Tetany}& \text{2. Thyroid}\\ \text{C. Acromegaly}& \text{3. Adrenal cortex}\\ \text{D. Myxoedema}& \text{4. Parathyroid.}\end{array}$$

Which among the following in a food chain flows unidirectionally?

What is an ovule and what does it become after fertilisation?

What we know today as genes were what Mendel called as _________.

……………… and ……………….. are the two major events in any cell division.