In plants, exchange of gases takes place through

Gaseous exchange takes place in leaves through tiny pores for the purpose of photosynthesis. What are these pores?

A

Chloroplast

B

Stomata

C

Chlorophyl

D

Vacuole

Exchange of gases occurs through which part of the plant tissue?

A

Phloem

B

Stomata

C

Xylem

D

Midrib

In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by

A

Convection

B

Radiation

C

Conduction

D

Both convection and conduction

A garden has to plant tress in rows containing equal number of trees. If he plants in rows of 6,8,10 or 12. then five tress are ledt unplated. But if he plants in rows of 13 tress each, then no tress is left. What is the number of tress that the gardener plants?

A

485

B

854

C

725

D

625

Mrs. Jansen recently moved to Arizona. She wants to fill her new backyard with flowering plants. Although she is an experienced gardener, she isn't very well-versed in what plants will do well in the Arizona climate. Also, there is a big tree in her backyard making for shady conditions and she isn't sure what plants will thrive without much direct sunlight. Her favorite gardening catalog offers several backyard seed packages. Which one should Mrs. Jansen choose?

A

The Rainbow Collection is ideal for North-east gardens. It includes a variety of colorful perennials that thrive in cool, moist conditions.

B

The Greenhouse Collection will blossom year after year if planted in brightly lit locations and watered regularly.

C

The Treehouse Collection will provide lush green plants with delicate colorful flowers that thrive in shady and partially shady locations.

D

The Oasis Collection includes a variety of perennials that thrive in dry climates and bright sunlight.

The exchange rate is the ruling official rate of exchange of dollars for other currencies . It determines the value of American goods in relation to foreign goods. If the the dollar is devalued in terms of other currencies , American exports ( which are

A

There are certain disadvantages for the United States economy attached to devaluation

B

The prospect of devaluation results in a speculative outflow of funds

C

By encouraging exports and discouraging imports, devaluation can improve the American balance of payments

D

The difference between the exports and imports is called the trade gap

East Pakistan Stock Exchange Association Ltd. Previous name of Dhaka Stock Exchange, was incorporated in the year.

A

1952

B

1953

C

1954

D

1964

Bangladesh adopted floating exchange rate system of foreign exchange on :

A

March 30, 2003

B

April 30, 2003

C

May 30, 2003

D

June 30, 2003

East Pakistan stock exchange Association Ltd. Previous name of Dhaka Stock Exchange , was incorporated in the year.

A

1952

B

1953

C

1954

D

1964

The exchange rate is the ruling official rate of exchange of Taka for other currencies. It determines the value of Bangladeshi goods in relation to foreign foods. If the Taka is devalued in terms other currencies Bangladeshi exports (which are paid for in Taka ) become cheaper to foreigners and Bangladeshi imports become more expensive to holders of Taka. What conclusion can be drawn form the information above?

A

There are certain disadvantages for the Bangladesh economy attached to devaluation

B

The prospect of devaluation results in a speculative outflow of funds.

C

The difference between imports and exports in called the Trade Gap.

D

It is possible that inflation neutralized the beneficial effects of devaluation

In plants, exchange of gases takes place through

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