Answer:
The correct reason would be "the levels of dissolved oxygen at the mouth of the river and at the source of the river".
The mouth of the river is the region where it flows into the ocean, lake, another river, reservoir, sea et cetera. The level of dissolved oxygen in this region is too low to support great biodiversity.
Organisms like catfish and carp can survive here due to their low oxygen demand. For example, catfish can survive in water with an oxygen content of 2.5 parts per million.
In contrast, the level of dissolved oxygen is higher at the source of the river. Organisms like trout are found here due to their high oxygen need. For example, rainbow trout require minimum 5-6 parts per million dissolved oxygen for its survival.
Courtship and mating rituals are diverse and can vary greatly among different animal species. They are typically involved in attracting mates, establishing pair bonds, and ensuring successful reproduction.
1. Courtship and Mating Rituals Exist: Many animal species have elaborate courtship and mating rituals. These behaviors can serve various purposes, such as displaying fitness and attractiveness to potential mates, establishing territory, or demonstrating parental abilities.
2. Absence of Courtship and Mating Rituals: Some animal species may not exhibit elaborate courtship or mating rituals. This can occur in species where mating opportunities are abundant or where the reproductive process is straightforward without the need for elaborate displays.
The presence or absence of courtship and mating rituals can depend on various factors, including ecological pressures, social structure, reproductive strategies, and evolutionary history of the species. Different species have evolved different strategies to maximize their reproductive success, and these strategies can manifest as complex courtship rituals or simpler methods of attracting mates.
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Answer:
what grade
Explanation:
Answer: At the inner core of the earth interior, top density continue to increase as thickness decrease.
Explanation:
The Earth is the third plant from the sun and the fifth largest plant. It is the only planet that can harbor life, that have oxygen in the arthmosphere and oceans on the surface. The Earth have three main layer which are the core(the outer and inner core), the mantle and the crust. All the three layers support life existence. The earth inner core is the innermost geologic layer and it is hot and denser. It is a solid ball of 1,220 kilometers. The earth inner core has the highest density (12)than all other layers and it is less thicker than mantle and the crust. Density increase with depth because the pressure increases also.
Answer:
inner core
Explanation:
just took on edge 2021
A. alcohol termination of the grape juice by anaerobic bacteria
B. lactic acid fermentation of the grape juice by anaerobic bacteria
C. alcoholic fermentation of the grape juice by aerobic bacteria
Answer:
lactic acid fermentation of the grape juice by anaerobic bacteria
Explanation: