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Splitting of water molecules during light reaction of photosynthesis is associated with

(a) PS I resulting in the release of $O_2$, protons and transfer of electrons to PS II

(b) PS II resulting in release of $O_2$, protons and transfer of electrons to PS I

(c) PS II resulting in release of $O_2$, protons and transfer of electrons to PS II

(d) PS I resulting in the release of $O_2$, protons and transfer of electrons to PS I.

Of the above statements

What is the name of the process in which the thickened uterus lining along with its blood vessels is removed from the body of a woman through vaginal bleeding?

What are lenticels? Where are they found?

The earliest ancestors of higher plants are

What is the best technique for watering gardens?

In girls, pubertal changes( adolescence) usually, begin _____ boys of the same age.

Identify the type of life cycles represented by the following diagrams.

With respect to the given image choose the options which best fit I and II.

Respected Sir,

Is chlamydomonas a plant or animal.If it is animal then why it contains chloroplast?

Give the names of the different stages of life cycle of silkworm.

Insect pollinated flowers have ___ pollen grains.

Which one of the following statements in not true?

​​​​​What is Fermentation?

please answer fast

Which of the following is likely to be secreted when you need a sudden burst of energy?

Classification of clay soil.

Like texture , colour , deficient in , seen in etc..

Which of the following is a common physical change observed in both girls and boys during puberty?

7 characteristics of living organisms- (mrs.gren)

A female hired to develop the in-vitro fertilized egg of another female to maturity is called

Sterilization of tissue culture medium is done by

___ means all types of plants, naturally occurring in a particular area.

Which of the following is not a kharif crop ?

(a) paddy (b) mustard (c) maize (d) groundnut

(a) What is a vaccine ? How does a vaccine work ?

(b) Why are children given vaccination ?

Name the hormone which prepares our body for action to face emergency situations like danger, fear, anger or excitement.

It was observed that the tadpoles are not growing into adult frogs in a village pond. A scientist who was asked to find the reason for this concluded that the pond water did not contain a sufficient amount of a mineral P which could make a hormone Q. The hormone Q can cause a phenomenon R in tadpoles so that they become adult frogs.

(a) What are (i) P (ii) Q, and (iii) R?

(b) Name one human disease which can also be caused due to the deficiency of P in the food and water.

Identify the plants depicted in the given image.

What is ploughing (or tilling) ? Name any two implements used for tilling the fields.

Name the tissue in plants that is involved in the transportation of food (Xylem/ Phloem).

Which of the following is not the use of garlic?

Which of the following are true about chloroplasts?

what are the difference between asteroids and meteorides and comets?

what are the similarities between asteroids and meteorides and comets?

(provide the differences in points and in the form of a table)

Describe the various steps involved in the sexual reproduction in animals.

Write true or false. Plants that manufacture their own food are called heterotrophs.

How is curd prepared? [2Marks]

Question 42
Name the cell organelles which can be compared to the following:

(a) Transporting channels of the cell

(b) Power house of the cell

(c) Packaging and dispatching unit of the cell

(d) Digestive bag of the cell

(e) Storage sacs of the cell

(f) Kitchen of the cell

(g) Control room of the cell

List the changes and problems associated with puberty that adolescents face.
[3 MARKS]

Nucleus is absent in

Are active transport and ascent of sap same?

If not what's the difference.

Which of the following is a single-celled organism?

The plants grow fastest if we add fertilizers in the soil but if we add money or plants grow but at slower rate give reason

______ mosquito is a vector of dengue