Answer:
Adaptation
Explanation:
Some beaks made it easier for the type of food that bird was trying to get, for example the sharper the beak the better it could possible break a nut
Grasshopper and cricket are two organisms in the food web would MOST LIKELY be affected by a decrease in producers, or the plants, at the bottom base of the food web.
D) grasshopper and cricket
<u>Explanation:</u>
A food web comprises of many food chains. An evolved way of life just follows only one way as creatures discover food. It is an enormous number of plants and creatures things. A food web shows a wide range of ways plants and creatures are associated with one another for their prey.
Though Grasshopper and cricket are two living beings in the nourishment web that would be generally influenced by a diminishing in makers, or the plants, at the base of the nourishment web.
Like every living life form, crickets and grasshoppers assume a significant job in keeping up the equalization of the biological system. They breakdown plant material, restoring soil minerals. They are also an important source of food for other animals.
The longest phase of mitosis is prophase. Because the nuclear membrane disappears, Nucleolus disintegrates, and the DNA condensed to form chromosomes (each chromosome is composed of sister chromatids attached around centromere.)
A. objects made of crystals minerals water and air
Process of elimination-
there isn’t organic matter in rocks so D is out
they are made of minerals so B is out
some types of rock (pumice) have air bubbles in them so A is more likely than C
Answer:
1. Stabilizing Selection
2. Directional Selection
3. Disruptive Selection
Explanation:
Stabilizing Selection
This type of natural selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for. If we look at a distribution of traits in the population, it is noticeable that a standard distribution is followed:
Example: For a plant, the plants that are very tall are exposed to more wind and are at risk of being blown over. The plants that are very short fail to get enough sunlight to prosper. Therefore, the plants that are a middle height between the two get both enough sunlight and protection from the wind.
Directional Selection
This type of natural selection occurs when selective pressures are working in favour of one extreme of a trait. Therefore when looking at a distribution of traits in a population, a graph tends to lean more to one side:
Example: Giraffes with the longest necks are able to reach more leaves to each. Selective pressures will work in the advantage of the longer neck giraffes and therefore the distribution of the trait within the population will shift towards the longer neck trait.
Disruptive Selection
This type of natural selection occurs when selective pressures are working in favour of the two extremes and against the intermediate trait. This type of selection is not as common. When looking at a trait distribution, there are two higher peaks on both ends with a minimum in the middle as such:
Example: An area that has black, white and grey bunnies contains both black and white rocks. Both the traits for white and black will be favored by natural selection since they both prove useful for camouflage. The intermediate trait of grey does not prove as useful and therefore selective pressures act against the trait.
