Correct Answer: A. Receptor?sensoryneuron?synapse?intermediateneuron?synapse?motorneuron?effector

Correct Answer: B. two

Correct Answer: C. eye spot

Correct Answer: A. pancreas

Correct Answer: A. schistosomiasis

Explanation

Explanation

(a) Characters which can be transmitted from parents to offspring in man are:

(i) Tongue rolling

(ii) Sickle cell anaemia

(iii) Colour blindness

(iv) Height (Tallness or shortness)

(v) Haemophilia

(vi) Colour of skin

(vii) Colour of hair

(viii) ColoOr of eyes

(ix) Shape (wrinkle or round).

(b) Two differences between mitosis and meiosis are:

(c)(i) Meiosis has contributed a lot in the development of quality organisms by bringing together good characters from both parents into an offspring. Mostly used in animal husbandry and crops improvement, Meiosis also involves exchange of materials which bring about variation in the offspring.

(ii)Fertilizationis the first stage in the formation of a new organism. Without fertilization, it would be impossible to produce new organisms through sexual reproduction. Hence, it has erased the possibility of most organisms going into extinction because most offspring resemble their parents.

Reasons for the answer in (d)(i):

In F1 generation, all the numbers produced are heterozygous (dominant recessive) blue. When self pollinated, the F2 generation produced three blue offsprings which are homozygous blue, two heterozygous blue and one white.

Reason for (d)(ii):

Two of the offsprings produced are heterozygous blue and two homozygous recessive white (2:2) or (50:50). This result is due to F1 parents

which are heterozygous blue and the pure breeding white flowers which are homozygous recessive white.

Correct Answer: A. I

Correct Answer: C. a wind vane

Correct Answer: C. Survival of the fittest

Correct Answer: C) NADPH and ATP are synthesized using electron released from water

Explanation

The question is asking what happens during the light-dependent reaction in photosynthesis. The light-dependent reaction occurs in the thylakoid membrane of the chloroplast and it is the first stage of photosynthesis. It is called light-dependent reaction because light is the source of energy that drives the reaction. Option A, glucose is formed, is incorrect because glucose is not formed during the light-dependent reaction. Glucose is formed in the second stage, which is the light-independent reaction (also known as the Calvin Cycle). Option B, carbon IV oxide is fixed, is also incorrect because carbon dioxide is not fixed during the light-dependent reaction. Carbon dioxide is fixed during the light-independent reaction. Option C, NADPH and ATP are synthesized using electron released from water, is the correct option. During the light-dependent reaction, light energy is absorbed by chlorophyll and other pigments, which excite electrons that are then passed along a chain of electron carriers. The energy released during electron transport is used to pump protons across the thylakoid membrane, creating a concentration gradient that is used to create ATP. The electrons eventually end up on NADP+ and are used to make NADPH. Water is split to provide electrons to replace those that were lost from chlorophyll. Option D, water is split and the electrons produced are used for glucose synthesis, is incorrect because glucose is not synthesized during the light-dependent reaction. Glucose is synthesized during the light-independent reaction. Overall, the correct answer is option C because NADPH and ATP are synthesized using electrons released from water during the light-dependent reaction in photosynthesis.