The Process of Respiration in Plants. A. It is minute pore present in soft aerial parts of the plant. Figure 62. Stomata can be distributed in the following ways on the two sides of a leaf: • An amphistomatous leaf has stomata on both surfaces. A group of mostly desert plants called "CAM" plants (Crassulacean acid metabolism, after the family Crassulaceae, which includes the species in which the CAM process was first discovered) open their stomata at night (when water evaporates more slowly from leaves for a given degree of stomatal opening), use PEPcarboxylase to fix carbon dioxide and store the products in large vacuoles. Stomata cover 1-2% of leaf area. For the purposes of discussing plant pathology, only plant disease pathogens will be discussed. B. Most plants have such a distribution. C. The roots begin to rot, causing them to no longer uptake water. A blue colour flower plant denoted by BB is crossbred with a white colour flower plant denoted by ww. Plant cells lose a portion of their water content while the stomata are open, leaving the plant susceptible to dehydration. C There are separate male and female flowers on the same plant. B The anthers and stigmas on the same plant mature at the same time of year. Algae, fungi and submerged plants do not possess stomata. The control of water loss by transpiration is, however, strikingly different in a xerophyte compared to a … In many desert plants, stomata very often close during the hottest hours of the day when the cooling effect of transpiration would be most advantageous. Consequently, leaves, stems and roots of plants separately exchange gases. Stomata open and close to allow the intake of carbon dioxide and the release of oxygen. Pathogens can spread from plant to plant and may infect all types of plant tissue including leaves, shoots, stems, crowns, roots, tubers, fruit, seeds and vascular tissues (Figure 62). Hence, each part nourishes and fulfils its own energy requirements. This adaptation helps cacti reduce water loss by keeping the hot, dry wind from blowing directly across the stomata. (a) Stomata are minute pores of eliptical shape, consists of two specialized epidermal cell called guard cells. 26 During sexual reproduction in plants, what will give rise to the greatest variation in the offspring? Plants 'breathe' too, but they do it through tiny openings in leaves called stomata (singular: stoma). The stomata of many cacti lie deep in the plants’ tissues. During respiration, in different plant parts, significantly less exchange of gas takes place. The plant begins absorbing oxygen and releasing carbon dioxide into the atmosphere. A All of the flowers on the same plant have male and female reproductive organs. Which of the following describes a phenomenon that occurs when we observe plants that wilt? The stomata close, cutting off transpiration and gas exchange. D. The xylem releases all its water. 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