A.
True
B.
False
Annelida are segmented warms that developed a straight and complete digestive system, and close circulatory system. The statement is TRUE.
Annelida are the segmented warms than has been include terrestrial and the aquatic species. They characterize for the having their bodies segmented into equal parts linearly arranged along the anteroposterior ax.
Their digestive system has the straight, going from the mouse in the anterior region to the anus in the posterior region. It has been located in the center of the coelom, being held by the septums. Digestion has the extracellular. Excretion is done through nephridium.
Annelida have the well-developed closed circulatory system, in which the blood remains and the flows in vessels. The statement Members of phylum annelida have a closed circulatory system and a complete digestive system is TRUE.
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B. Photosynthesis
C. Decaying organisms
D. The gases in the atmosphere
Answer: A. Positive ions
An ocean is a reservoir of carbon. All of the following bring carbon into the ocean except positive ion:
Photosynthesis: Photosynthesis is conducted by aquatic plants in the ocean to prepare their food which is a carbon product.
Decaying organisms: The aquatic plants and animals are buried beneath the ocean bed and they are decayed and decomposed by the activity of microbial organisms. The organic matter produced after this process is rich source of carbon.
The gases in the atmosphere: The gases in the atmosphere consist of carbon dioxide and carbon monoxide released in the atmosphere by burning of fossil fuels, greenhouse gas emission and by other process. These gases are dissolved into ocean water making it available for photosynthesis conducted by aquatic plants. Hence, carbon from the atmosphere enters in ocean through these atmospheric gases.
Mechanical weathering physically breaks down rocks without changing their composition, while chemical weathering alters the chemical composition. Both types of weathering are influenced by climate and contribute to the erosion of rocks.
Mechanical weathering is the physical breakdown of rocks into smaller pieces without changing the composition of the rock, while chemical weathering is the process that alters the chemical composition of rocks, causing them to break down. Mechanical weathering can occur through processes like frost wedging, abrasion, and exfoliation, whereas chemical weathering can occur through processes like oxidation, hydration, and carbonation.
Despite their differences, there are some similarities between mechanical and chemical weathering. Both processes can be influenced by climate and environmental conditions, such as temperature and rainfall. Additionally, both types of weathering contribute to the overall breakdown and erosion of rocks, ultimately shaping the Earth's surface.
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b. another organism
c. an ecosystem
d. its community
The answer is A. An abiotic factor