Inflorescence - racemose and cymose — practice questions

Question 1 · difficulty L1 · recall

In a racemose inflorescence, what happens to the main axis?

• A. It continues to grow
• B. It terminates in a flower early
• C. It becomes an underground stem
• D. It produces only one flower

Question 2 · difficulty L2 · understanding

Which flowering sequence is typical of a racemose inflorescence?

• A. Older flowers toward the base and younger flowers toward the apex
• B. Younger flowers toward the base and older flowers toward the apex
• C. All flowers develop simultaneously
• D. Only the terminal flower develops

Question 3 · difficulty L2 · understanding

Why is a cymose inflorescence described as determinate?

• A. The main axis ends in a flower and therefore has limited growth
• B. It never produces lateral flowers
• C. Its flowers lack pedicels
• D. The main axis grows indefinitely

Question 4 · difficulty L3 · understanding

In racemose inflorescence, $\_\_\_\_$ .

• A. The main axis terminates in a flower
• B. Flowers are solitary
• C. The growth is limited
• D. Flowers are borne in an acropetal succession

Question 5 · difficulty L3 · understanding

Match the following : Type of flower Example (A) Zygomorphic (I) Mustard (B) Hypogynous (II) Plum (C) Perigynous (III) Cassia (D) Epigynous (IV) Cucumber Select the correct option :

• A. (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
• B. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• C. (A)-(IV), (B)-(I), (C)-(III), (D)-(II)
• D. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

Question 6 · difficulty L3 · understanding

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem. Reason R : Internode of the shoot gets condensed to produce different floral appendages laterally at successive node instead of leaves. In the light of the above statements, choose the correct answer from the options given below :

• A. Both A and R are true but R is NOT the correct explanation of A
• B. A is true but R is false
• C. A is false but R is true
• D. Both A and R are true and R is the correct explanation of A

Question 7 · difficulty L3 · understanding

Ray florets have

• A. Superior ovary
• B. Hypogynous ovary
• C. Half inferior ovary
• D. Inferior ovary

Question 8 · difficulty L3 · application

An inflorescence has a terminal flower that opens first, while progressively younger flowers occur toward the base. Which type is indicated?

• A. Cymose
• B. Racemose
• C. Solitary axillary
• D. Spadix only

Question 9 · difficulty L4 · analysis

Inflorescence X has an indefinitely growing main axis with acropetal flower succession. Inflorescence Y terminates in a flower and shows basipetal succession. Which pairing is correct?

• A. X racemose, Y cymose
• B. X cymose, Y racemose
• C. Both racemose
• D. Both cymose