A mutation will always lead to natural selection.
1. All mutations will lead to natural selection
2. Neutral mutations will lead to natural selection
3. Beneficial mutations will lead to natural selection
4. Harmful mutations will lead to natural selection
3. Beneficial mutations will lead to natural selection. Other types of mutations (neutral or harmful) may or may not lead to natural selection, depending on the environmental conditions and the impact on an organism's survival and reproduction.
An organism does not adapt to changes in the environment. A population does. This is because;
1. The above statement is false
2. An organism cannot change it's alleles but a population already has variations of alleles
3. It takes many generations for adaptations to occur and a single organism does not live long enough
4. A mutation must be beneficial to be considered an advantageous trait
2. An organism cannot change its alleles, but a population already has variations of alleles. Organisms themselves do not adapt to changes in the environment because they cannot change their genetic makeup in response to environmental pressures. However, populations can adapt over time as certain traits become more common due to natural selection, genetic drift, and other mechanisms. This is because populations already have variations of alleles that can be selected for or against based on environmental pressures.
Selective pressures lead to natural selection. What is a selective pressure in nature?
A. Something in an environment that is causing some members of a population to die while others survive
B. Something in an environment that is causing a population to go extinct
C. Something in the environment that is causing a population to migrate
D. Something in an environment that is causing populations to live together
A. Something in an environment that is causing some members of a population to die while others survive. Selective pressures are environmental factors or conditions that affect the survival and reproductive success of individuals in a population. These pressures can be biotic (such as predation, competition, or disease) or abiotic (such as temperature, humidity, or availability of resources), and they lead to certain traits being favored over others. This process of selection can result in the emergence of new species or the evolution of existing ones.
On a distribution curve for body size of dogs over time, the curve shifts to the left. What does this tell us the change in dogs over time?
1. Over time dogs have become smaller
2. Over time dogs have become larger
3. Over time dogs have stayed the same size
4. The graph does not tell us this information
1. Over time dogs have become smaller. The shift to the left on a distribution curve for body size of dogs over time indicates that the population has evolved to become smaller over time. This could be due to various factors, such as changes in environmental conditions, natural selection for smaller body size, or genetic drift.
We talk about natural selection backwards. We say that natural selection 'selects for' a variation. For example: In the grasslands in Africa, gazelles with long legs are selected for. Choose the most likely explanation of why long legs are 'selected for.'
1. Nature wants more gazelles with long legs
2. Gazelles with long legs can wade out deeper into the water
3. Gazelles with short legs are slower and easier for lions to catch
4. Gazelles with long legs are prettier than gazelles with short legs
3. Gazelles with short legs are slower and easier for lions to catch. The selection for longer legs in gazelles is due to natural selection based on survival and reproductive success. Gazelles with longer legs may be more able to outrun predators or access food resources such as tall grasses. In contrast, gazelles with shorter legs may be at a disadvantage and more likely to be caught by predators, reducing their chances of surviving and reproducing.
What is the difference between natural selection and artificial selection?
A. Natural selection means that nature decides which organisms will reproduce while artificial selection means that the organism gets to select a mate for reproduction
B. Natural selection involves natural DNA but in artificial selection the DNA has been combined with the DNA of another organism
C. Natural selection occurs through natural reproduction methods but artificial selection is not a natural reproductive method
D. Natural selection selects variations that benefit survival while artificial selection selects variations that benefit humans