21. O Ammoglanis obliquus consiste em uma espécie de bagre identificada em rios da Amazônia. Essa espécie tem comprimento máximo de \( 1,5 \mathrm{~cm} \) e se diferencia de outros peixes do gênero por quanti- dade e formato dos ossos, bem como pela dentição e pela quantidade e localização de suas nadadeiras. Represente o comprimento máximo do Ammoglanis obliquus utilizando micrômetros e nanômetros e adotando a representação em notação científica.

26. A place of land can be used as collateral to obtain loans from commercial banks, when the land \( \qquad \) (a) inherited from his parents (b) given for use over a short period of time (c) allocated by the government (d) requires the payment of certain amount of money for the land 27. Which of the following statement is not correct about afforestation (a) it prevent the leaching of plant nutrient (b) it increases soil moisture retention (c) undesirable species of timber are removed (d)regular supply of raw materials 28. Plants that are cultivated for their vegetative portions and used in fresh or preserved form for feeding livestock is (a) arable cropping (b) forage (c) pasture (d) monocropping 29. Diseases can be spread on a crop farming through any of the following except one (a) through planting of vegetables (b) through insect vectors (c) through irrigation water (d) through visitors to the farm 30. \( \qquad \) is the planting of arable crops at early stages of forest establishment and are harvested before the trees form canopies (a) Selective exploration (b) Taungya system (c) Regeneration

Mining contributes significantly to the economies of West African countries. What is a major environmental issue associated with gold mining in Ghana? a. Mercury contamination in rivers and groundwater b. \( \begin{array}{l}\text { Depletion of coastal wetlands due to } \\ \text { excavation }\end{array} \) c. \( \begin{array}{l}\text { Overgrazing of land used for mining } \\ \text { settlements }\end{array} \) displacement of forest-dwelling communities

A country with a fertility rate of 1.5 births per woman is likely to experience: a. Population decline. b. Population stabilization. c. Increased birth rates in rural areas. d. Rapid population growth.

Untuk mengamati fertumbuhan bauteri Pada inangnya. Seorang Penelit: mengambil Potongan inangnya yang sudah terinfeksi bauteri tersebut dan mengamati selama 5 jam pertama. Poda inangnyatersebut terdafat 30 bauteri. Setelan diamati baikleri tersebut membelah menjadi dua setiap 30 menit. a. Modelkan fungsi Pertumpuhan bakteri setiap fase! Mang

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