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What is happening to the amount of carbon dioxide in the atmosphere?

Amanita was cleaning her room. While cleaning by mistake her fish pot fell down and her gold fish died. Why do you think it couldn't survive? [3 MARKS]

Discuss the
following questions in detail and write the answers in your
notebooks:

(a) Do you
think the tiger shooting organized by the villagers was a serious
affair?

Give
reasons for your answer.

(b) Do you think the writer is trying to
make fun of the main characters in the story i.e. Mrs. Packletide,
Miss Mebbin and Loona Bimberton? Pick out instances from the story
that point to this fact.

(c) A person who is vain is full of self
importance and can only think of himself/herself and can go to
great lengths to prove his/her superiority. Do you think Mrs
Packletide is vain? Give reasons in support of your answer.

(d) Sometimes writers highlight certain
negative aspects in society or human beings by making fun of it. This
is called satire. In your groups discuss whether you would classify
this story as a satire. Give reasons to support your answer

(e) How does
the writer create humor in this story?

Mention three important differences between the action of hormones and that of nerves in the regulatory mechanism of our body.

What is mental dimension of health?

Answer the following.

Give the definition of a pollutant.

Chlorophyll is found in _______.

Question 39

Is the chromosome number of a zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?

Sperms develop from germ cells in the seminiferous tubules of the testis at ________ .

पेड़
और
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में
दोस्ती
कैसे
हुई?

Match the terms in column I with their explanations in oclumn
$$\begin{array}{cc}ColumnI& ColumnII\\ \left(term\right)& \left(Explanation\right)\\ \text{a. Genetics}& \text{(i) Chromosomes similar in size and shape}\\ \text{b. Autosomes}& \left(ii\right)Thealternativeformsfoagene\\ \text{Recessive gene}& \left(iii\right)\text{Study of laws of inheritance of characters}\\ \text{d. Allele}& \text{A gene that can express only when in a similar pair}\\ \text{e . Homologous chromosomes}& \text{Chromosomes other than the pair of sex chromosomes.}\end{array}$$

Two potted green plants of the same kind were taken to perform an experiment. One of them was kept in a dark room, while the other one was kept in sunlight for 3–4 days. A leaf from each of the plant was taken to perform the iodine test. Which of the leaves turned blue-black in colour? [5 MARKS]

The rate of transpiration increases by an increase in the:

______ acts as hormonal contraceptive by changing the levels of natural hormones such as estrogen and progesterone.

Explain with an example, how genes control the charcteristics (or traits) .

Q4. Beta amyloid is associated with which disease

Sound is measured in _______.

The peppered moth experiment in which black moths become predominant over white moths during industrial revolution demonstrates which of the following?

Question 40

Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate)

Spongilla, Sea anemone, Planaria, Liver fluke, Wuchereria, Ascaris, Nereis, Earthworm, Scorpion, Birds, Fishes, Horse.

The diagram shows the outline of the human excretory system.

Identify X and it's function.

During the stimulation of an impulse, how do the charges distribute on either side of the plasma?

Which of these is/are natural additives?

Advantage of cleistogamy is:

Question 77

Draw the diagram of the alimentary canal of man and label the following parts.

Mouth, Oesophagus, Stomach, Intestine

Which of these is an Intra-Uterine Device(IUD)?

The Mimosa exhibits closing movement when it is exposed to abiotic factors such as______ , protecting the plant from physical damage or desiccation.

A cross between two individuals results in a ratio of 9 : 3 : 3 : 1 for four possible phenotypes of progeny. This is an example of a :

(a) dihybrid cross (b) monohybrid cross (c) test cross (d) none of these

The troposphere contains _____ % of the air.

Is HCL and salivary amylase a digestive enzyme?