Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of ________.

 I) an autocrine signal

 II) a paracrine signal

 III) an endocrine signal

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#Question id: 40160

#Environmental Science

Q. Which of the following are true regarding ecological pyramids?

(A). The pyramid of energy is always upright 

(B). The pyramid of biomass in a sea is generally inverted 

(C). The pyramid of number in a tree ecosystem is inverted

 (D). Saprophytes are given a specific place in ecological pyramids

Choose the correct answer from the options given below:

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#Question id: 40161

#Botany

Q. Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): C4 plants are photosynthetically more efficient than C3 plants.

Reason (R): C4 plants lack the process of photorespiration due to the concentration of CO₂ at the enzyme site (RuBisCO).

In light of the above statements, choose the correct answer from the options given below:

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#Question id: 40162

#Botany

Q. Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): In angiosperms, the endosperm is triploid (3n).

Reason (R): It is formed by the fusion of one male gamete with the egg cell.

In light of the above statements, choose the correct answer from the options given below:

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#Question id: 40163

#Botany

Match List I with List II

LIST I (Causal Organism)	LIST II (Disease)
A. Phytophthora infestans	I. White Rust of Crucifers
B. Puccinia graminis	II. Citrus Canker
C. Xanthomonas citri	III. Late Blight of Potato
D. Albugo candida	IV. Black Rust of Wheat

 Choose the correct answer from the options given below:

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#Question id: 40164

#Botany

Match List I with List II 

LIST I (Algal Class)	LIST II (Stored Food/Feature)
A. Chlorophyceae	I. Floridean Starch
B. Phaeophyceae	II. Cyanophycean Starch
C. Rhodophyceae	III. Starch & Pyrenoids
D. Cyanophyceae	IV. Mannitol & Laminarin

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#Question id: 40165

#Botany

Match List I with List II

LIST I (Phytohormone)	LIST II (Physiological Effect)
A. Auxin	I. Fruit Ripening
B. Gibberellin	II. Stomatal Closure (Stress hormone)
C. Ethylene	III. Apical Dominance
D. Abscisic Acid (ABA)	IV. Bolting (Internode elongation)

Choose the correct answer from the options given below: