Q1-Write nitrogen cycle
Q2-Draw Diagram of stem
Q3-What are the parts of stem
Q4-Write the functions of stem
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Answers
refer to the attachment
Answer:
Q1 The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is atmospheric nitrogen,[16] making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.
Q2 diagram is in the attachment
Q3 Xylem and Phloem conduct water across the plant. Stems stores food, water, and nutrients. Cells of a stem, meristems, produce new living tissues. Underground stem, Aerial stem, and subaerial stem are three different types of Stem.
The stem is divided into two parts; nodes and internodes. Nodes are where buds grow into leaves, stems, or flowers and internodes are the parts of the stem in between the nodes (see Figure 8). In most plants, stems are found above the ground, but for some plants, such as potatoes, stems are also found below the ground.
Q4A stem performs the following functions in a plant:
(i) It supports branches, leaves, flowers, and fruits.
(ii) It transports water and minerals from the roots to the leaves and other parts of plants.
(iii) It transports food from leaves to different parts of the plant.
(iv) It holds the plant upright.
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