The question that most likely relates to the ecologist's observations and collected data is, 'Are fish dying due to reduced oxygen in the water?'
<h3>Research questions</h3>
Research questions are usually coined from observations. Observation is the first step in the scientific method. Once the research questions have been formed, hypotheses follow.
In this case, the ecologist, who happens to be the researcher in this case, observed that fishes were dying in large numbers. Fortunately for the researcher, he also observed that the lakes around the city where fishes were dying had significant algae growth as well as reduced oxygen levels.
The right questions to ask, therefore, should try and relate to observations together.
Thus, linking the death of the fishes to reduced oxygen levels in the lakes is the right question to ask.
More on research questions can be found here: brainly.com/question/27824868
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Most probably the right choice for this is <u>A. extraembryonic membranes</u> because this is known as the structural adaptation in chickens that allows them to lay eggs in arid environments rather than in water.
The four extraembryonic membranes that surround the chick's embryo are the chorion, which helps with gas exchange, the amnion, which encloses amniotic fluid, the yolk sac, which protects the yolk, and the allantois, which helps with waste removal and gas exchange.
Physical traits that have evolved on chickens through time in order to help them live and reproduce are called structural adaptations.
Over time, the hens that are more well-adapted to their surroundings survive and breed more consistently, causing their genes and adaptations to be passed down to future generations of chickens.
Learn more about the two adaptations to plants: brainly.com/question/22557205
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Nerve cells carry information to the brain. Muscle cells make up your muscles. Red blood cells carry nutrientsand air throughout the body.
with this option given I don't think there is an odd one
These three descendants together would be called sister groups.
<span>Hope this helped :)</span>