Correct Answer: B. 68.18cm

Explanation

L = \(\frac{R.A}{e} = \frac{4 \times 7.50 \times 106{-4}}{4.40 \times 10^{-5}} = 68.18cm\)

Correct Answer: B. collection of deposits from the public

Correct Answer: B. industrious

Correct Answer: B) the testa and fruit wall fuse after fertilization

Explanation

Maize grain is an important staple food in many parts of the world. The question asks why maize grain is considered a fruit and not a seed. The options are given as A, B, C, and D. The correct answer to this question is B: the testa and fruit wall fuse after fertilization. Maize grain is considered a fruit because it develops from the ovary after fertilization. The ovary is the part of the flower that contains the developing ovules, which later become seeds. In the case of maize, the ovary grows into a large structure called a cob, which is covered by leaves that form a sheath around it. Each kernel of maize is actually a fruit, with a single seed inside. The structure of the maize fruit is different from that of typical seeds. In a typical seed, the seed coat is distinct from the fruit wall, and the two structures do not fuse together. In maize, however, the fruit wall and the testa (the outer layer of the seed coat) fuse together after fertilization, forming a single structure that encloses the developing endosperm and embryo. This is why maize is considered a fruit rather than a seed. In summary, maize grain is considered a fruit because it develops from the ovary after fertilization, and the fruit wall and testa fuse together to form a single structure that encloses the seed. The correct answer to the question is B: the testa and fruit wall fuse after fertilization.

Correct Answer: A. disobedience

Correct Answer: C. hubris

Explanation

Hubris is the uncontrollable pride that causes the downfall of a hero. An action of the past (nemesis), or tragedy as a drama form, or catharsis (powerful or violent emotional development), are not synonymous with pride inherent of tragic flaws.

Correct Answer: A. Porifera

Explanation

Porifera are 'pore bearing' organisms, commonly known as sponges, are the only multicellular organisms without a nervous system. Their response to stimuli is by a contraction in their bodies.

Explanation

(b) Four ways in which the forest vegetation contributes to the economy of the country are:

(i) Provision of timber for construction of houses and furniture

(ii) Provision of foreign exchange earnings from the export of timber

(iii) Forest vegetation provides jobs to many people, e.g forest guards, lumbermen

(iv) Forest vegetation also provides medicinal herbs for the pharmaceutical industries.

(c) Four problems associated with exploitation of forest vegetation include:

(i) Heterogeneous nature of trees

(ii) Lack of motorable roads

(iii) High cost of survey to determine economic trees

(iv) Felling of timber is risky as many people have lost their lives in the process

Correct Answer: D. Uthman

Correct Answer: B. Improvement in health-care delivery