Correct Answer: C. suffocates the pupae

Correct Answer: B. pectoral and pelvics

Correct Answer: B. continuous variation

Correct Answer: A. adrenalin

Correct Answer: B) cambium

Explanation

Monocotyledons are a group of plants that have one embryonic leaf in their seeds. This question is asking us to identify the tissue that is not found in the stem and root of monocotyledons. The options given are xylem, cambium, pith, and pericycle. Xylem is a type of tissue that conducts water and minerals from the roots to the leaves. It is found in the stem and root of monocotyledons. Therefore, option A is incorrect. Cambium is a layer of cells that divide to produce new xylem and phloem cells. It is only found in dicotyledons and gymnosperms, which are plants that have two embryonic leaves in their seeds. Therefore, option B is the correct answer. Pith is a type of tissue that stores food and water in the center of the stem. It is found in the stem of monocotyledons. Therefore, option C is incorrect. Pericycle is a layer of cells that gives rise to lateral roots. It is found in the root of monocotyledons. Therefore, option D is incorrect. In summary, the tissue that is not found in the stem and root of monocotyledons is cambium, which is only found in dicotyledons and gymnosperms.

Correct Answer: D. gill-silts

Explanation

(a)(i) Biosphere: Total/whole area, part of the earth/lithosphere/ hydrosphere/water, and atmosphere/air, inhabitable by living things/where life exists.

(ii) Habitat: A place/home; within an environment, where an organism naturally lives/dwells.

(b) Mode of nutrition of named carnivorous plants:

• - Carnivorous plants have green leaves and are able to manufacture their own food carry out photosynthesis.
• They have roots to absorb water and mineral salts from the soil.
• Usually grow in places with little nitrogenous salts.
• Use insects/other small animals as source of Nitrogen.
• They have devices/modified leaves with bright colour/sents/sugary liquids/stcky wet surfaces for attracting and trapping insects.
• Once the insects is trapped, the plant secretes enzymes to kill and digest it.
• The soluble nitrogenous compounds are absorbed/assimilated by the plant.

Name of carnivourous plants: -

• Butterwort/Pinquicula
• Bladderwort/ Utricularia
• Sundew/Drosera
• Venus fly-trap/Dionaea
• Pitcher plants/Nepenthes/Sarracenta.

(c) Importance of fruits and seed dispersal: -

• Prevents overcrowding of plants.
• Prevents undersirable competition for space/light/water and nutrients.
• Prevents diseases from spreading among plant species.
• Results in colonization of new areas with new plants.
• Results in adaptation to adverse/harsh/unsuitable environment.

(d) Soil conservation method: -

• Contour ploughing/ridges are made along the contour of a slopping land/to prevent water running down the hill/slope/and washing away soil.
• Strip cultivation/the land is divided into strips along the contours of the slopes/crops are planted in rows that alternate with the strips planted with cover crops/grasses.
• Terracing/constriction of terraces which create barriers to hinder rapid water flow down the slope.
• Mulching/materials left after weeding or harvest are left to lie on the soil/ protecting the soil against agents of erosion.
• Afforestation/cover cropping/growing grasses, trees and shrubs to cover and protect the soil.
• Crop rotation/growing crops on a piece of land in sequence/season after season to maintain its fertility.
• Storm drains/construction of barriers/to stop free-flow of surface water through farms.
• Application of manure/fertilizer/to stabilize the soil.
• Avoid bush burning.
• Avoid over grazing.

Correct Answer: C. The pollen grains have rough spiny surfaces

Correct Answer: B. There must be xylem tissue used to conduct water

Correct Answer: D. pollination

Explanation

Pollination is not an activity associated with termites. Pollination is primarily carried out by various animals, such as bees, butterflies, birds, and bats, which transfer pollen from one flower to another, leading to fertilization and seed production. While some insects, like bees, are important pollinators, termites are not known for their role in pollination.