How would reducing low-growing plants from an area impact a population of tortoises with two varieties of neck extension ability: short and long distance?(1 point)
Responses
The variety of tortoises with the ability to extend their necks a long distance would go extinct.
The variety of tortoises with the ability to extend their necks a long distance would go extinct.
The variety of tortoises that could only extend their necks a short distance would go extinct.
The variety of tortoises that could only extend their necks a short distance would go extinct.
The proportion of tortoises with the ability to extend their necks a long distance would increase.
The proportion of tortoises with the ability to extend their necks a long distance would increase.
The proportion of tortoises that could only extend their necks a short distance would increase.
The proportion of tortoises that could only extend their necks a short distance would increase.
In an ecosystem, there are two color varieties within a species of toads: brown and green. Over 50 years, the proportion of the population that is green increases from 20% to 50%. Which statement is the most likely to explain this change? (1 point)
Responses
A disease caused a decrease in the proportion of brown toads.
A disease caused a decrease in the proportion of brown toads.
Pollution caused a decrease in the proportion of brown toads.
Pollution caused a decrease in the proportion of brown toads.
The environment changed such that toads that can jump higher into the trees to survive better.
The environment changed such that toads that can jump higher into the trees to survive better.
The environment changed such that green toads can blend into their surroundings better.
The environment changed such that green toads can blend into their surroundings better.
The environment changed such that green toads can blend into their surroundings better.
In an ecosystem where most flowers are long and bell-shaped, there are two varieties of hummingbird: birds with short beaks and birds with long beaks. What is the most likely hummingbird population composition? (1 point)
Responses
only short-beaked hummingbirds
only short-beaked hummingbirds
more short-beaked hummingbirds
more short-beaked hummingbirds
only long-beaked hummingbirds
only long-beaked hummingbirds
more long-beaked hummingbirds
more long-beaked hummingbirds
To answer this question, it is important to understand the relationship between low-growing plants, neck extension ability, and tortoise populations.
1. Start by understanding the role of low-growing plants in the environment: Low-growing plants provide food and shelter for tortoises. They are an important resource for their survival.
2. Analyze the impact of reducing low-growing plants: If the low-growing plants are reduced in the area, there will be a decrease in the available food and shelter for tortoises.
3. Consider the two varieties of tortoises with different neck extension abilities: The tortoises with the ability to extend their necks a long distance can reach food and shelter that is farther away, while those with a short distance neck extension ability have limited reach.
4. Evaluate the implications for each variety of tortoises:
- The variety of tortoises with the ability to extend their necks a long distance might be more successful in finding alternative food and shelter sources. They would have a higher chance of survival and reproduction compared to the other variety.
- On the other hand, the variety of tortoises that can only extend their necks a short distance would have limited access to food and shelter. This could lead to a decrease in their population size.
Based on the above analysis, the correct answer would be:
- The proportion of tortoises with the ability to extend their necks a long distance would increase.
Reducing low-growing plants would create a selective pressure favoring the tortoises with long distance neck extension ability as they would have a higher chance of survival and reproduction. Over time, this would lead to an increase in the proportion of tortoises with the long distance neck extension ability in the population.