Correct Answer: C) buccal cavity, skin and lungs

Explanation

In adult toads, gaseous exchange refers to the process where oxygen is taken in and carbon dioxide is released. Toads are amphibians, which means they can breathe through their skin. When they are in water, they usually take in oxygen through their skin. However, when they are on land, they use their lungs to take in oxygen. The question is asking which organs the toad uses for gaseous exchange. The options are buccal cavity, skin, spiracle, bladder, and lungs. The correct answer is option C, which is buccal cavity, skin and lungs. The buccal cavity is the area in the mouth of the toad, and it is used during respiration to move air into and out of the lungs. The skin is also used for respiration, especially when the toad is in water. The lungs are the primary organ used for respiration when the toad is on land. Therefore, in adult toads, gaseous exchange takes place through the buccal cavity, skin, and lungs. It is important to note that different animals have different methods of respiration, depending on their environment and habitat.

Correct Answer: A. anomic

Correct Answer: D. legitimacy

Explanation

Legitimacy is a political concept which refers to the acceptance and recognition by the citizens of a country the right of their rulers to govern. Power is transformed into legal authority by legitimizing it.

Correct Answer: B. chain store

Explanation

a [i]Ecological niche

where and organism lives and the role it plays in an ecosystem/community.

[ii] Roles of a mango tree in its ecological niche

i. absorbs water/mineral salts from the soil organism normally lives; and the

ii.absorbs sunlight for photosynthesis

ii.provides shelter for animals/other plants

IV.acts as support for creepers

V. produces fruits/food/serves as food

Vi. serves as fuel source for animals vii. covers the ground with dead leaves that enrich the soil

b[ i] Counting individuals could be impossible/difficult in fast moving animals

ii. Counting individuals could be tedious ii. Counting individuals could be time consuming/use of technique saves time

iv. The terrian/habitat could be difficult to reach

[ii] i. Quadrat method ii Random sampling method

ii.Sweep net method iv cluster sampling

V. Pitfall trap method vi. Line transect method

Vili.Light trap method ix. Stratified sampling

X. Tullgren funnel method xi. Convenience sampling

xii systematic sampling method

[c]i .Arch/tented arch ii compound

iii loops/double/central pocket/ulna radial loop

iv.whorls/accident/plain whorl

[d]i Pea plant/Garden pea plant/Pisum sativum.

ii a it is self-pollinated/flowers are bisexual

b has short life cycle

c produces many offspring in one cross

d presence of distinct physical characters that are easily recognisable.

b.Has a short life cycle

c.produces many offspring in one cross

d.presence of distinct physical characters that are easily recognisable

Correct Answer: B. hyperbole

Correct Answer: C. the demand for beverages

Explanation

The supply of cocoa is influenced by the demand for beverages. Cocoa is used for the production of beverages such as tea and coffee.

Correct Answer: B. 10

Correct Answer: B. DBMS

Correct Answer: B. 8.71N,61°

Explanation

Fx= 12cos32°-16cos26° = -4.20N (right is taken +ve and left is taken -ve)

Fy=12sin32°+16sin26°-21 = -7.63N (up is taken +ve and down is taken -ve)

\(R^2\)= 4.202+7.632

⇒\(R^2\) = 75.86

⇒ R=√75.86

∴R = 8.71 N

tan θ=\(\frac{opp}{adj}\)

⇒tan θ=\(\frac{7.63}{4.20}\)

⇒tan θ =1.8095

⇒ θ = \(tan^-1\) (1.8095)

θ = 61°

∴The angle of the resultant force with the x-axis is 61°