Question

Молюск елізія зеленовуха здатна в дорослому віці до фотосинтезу. Доведіть, що це все-таки тварина, а не представник рослинного світу

Answer 1

Відповідь:

Молюск елізія зеленовуха-це голозяберний молюск,здатний до фотосинтезу

Так як це молюск, то він має тваринні клітини .

Рослинна клітина має целюлозну клітинну стінку, пластиди                               ( хлоропласти, хромопласти, лейкопласти ), вакуоль з клітинним соком;

у тваринної клітини наявна еластична оболонка, відсутні пластиди, вакуоль відсутня, або дрібних розмірів

Молюск має тканини, властиві тількі тваринам: епітеліальну, сполучну та нервову.

Цей молюск харчується водоростями, перетравлюючи їх, і залишає лише хлоропласти, які вбудовує у своє тіло. Молодий молюск поступово накопичує хлоропласти і набуває здатності до фотосинтезу у дорослому віці   та може не вдаватися до гетеротрофного харчування.

Пояснення:

Answer 2

Молюск Elysia chlorotica, відомий як зеленовуха елізія, вIndeed, he is capable of photosynthesis in adulthood, which might lead one to believe that he is a plant rather than an animal. However, there are several characteristics that clearly classify him as an animal.

Firstly, Elysia chlorotica is a hermaphroditic gastropod mollusk, which is a type of animal. Mollusks are characterized by their soft bodies, lack of backbone, and the presence of a mantle and a muscular foot. They are also known for their shells, which are hard exoskeletons that protect their softer bodies .

Secondly, Elysia chlorotica exhibits several behaviors characteristic of animals. For instance, it is known to be capable of movement, which is a defining characteristic of animals. Animals are also known for their ability to respond to changes in their environment and to adapt to them. This is evident in Elysia chlorotica's ability to change its color based on its diet .

Thirdly, the photosynthetic ability of Elysia chlorotica is not unique to plants. While it is true that plants perform photosynthesis to convert light energy into chemical energy, some animals, such as certain types of coral and algae, are also capable of photosynthesis. However, the ability to perform photosynthesis does not necessarily classify an organism as a plant.

Lastly, the genome of Elysia chlorotica has been found to contain a gene similar to the nuclear gene psbO in water plants, which codes for a protein involved in photosynthesis. This suggests that Elysia chlorotica may have acquired this gene through horizontal gene transfer, a process by which genes are transferred between organisms without the process of sexual reproduction. However, this does not mean that Elysia chlorotica is a plant, as not all genes involved in photosynthesis are located in the nuclear genome of an organism .

In conclusion, while Elysia chlorotica is capable of photosynthesis, it is still classified as an animal due to its physical characteristics, behaviors, and genetic makeup.