Given question is incomplete as it lacks the group of choices. However, the group of choices associated with the question is as follows:
1. Organisms must display variation.
2. A trait must increase reproduction.
3. A trait must directly affect metabolism.
4. A trait must increase survival.
5. A trait must be able to be passed on to future generations.
Answer:
The correct answer is : option 3. A trait must directly affect metabolism.
Explanation:
The process that leads to change or adaption in the species or a population of the organism known as natural selection. In this process population exhibits the variation in the population due to the change or adaption.
This variation refers to the better traits and increased reproductive ability, suited to the environment than others which is also known as survival of the fittest as they increase their survival in comparison to the other population or species. Natural selection carries traits that are passed on to one generation to another.
Thus, the correct answer is option Is : 3. A trait must directly affect metabolism.
In recent molecular genetic studies, genes associated with the neurotransmitter Dopamine have been linked to ADHD.
ADHD stands for Attention Deficit Hyperactivity Disorder. People with ADHD have a hard time focusing on tasks. Scientists have found that the low levels of dopamine in the brain are associated with the symptoms of ADHD. It is because the neurons in the brain have a high amount of protein called the dopamine transporters. These proteins block the dopamine from passing between the neurons. This decreases the effect of dopamine.
Protein channels + no energy spent + following concentration gradient = passive transport via facilitated diffusion :)
Answer:
there might be fewer rabbits and foxes
Explanation:
If carrots were removed from the food web then there might be fewer rabbits and foxes. This is because based on this web, carrots make up 50% of the rabbit's diet. If this is removed, then there would not be enough food to maintain the same size population and the population will begin to shrink. This also applies to the fox population since their main source of food are the rabbits. If the rabbit population decreases, then the fox population will decrease as well since their food supply has shrunk and will not be able to maintain the current fox population size.
Answer:
Flower -> Insect -> small fish -> Big fish -> Seagull
Explanation:
All of these animals are eaten by the one arrow is pointing to.
