Explanation:
a. Some novel traits become fixed within a population, as they confer advantageous adaptations to an individual within their environment. These adaptations let these individuals live longer than their counterparts, and mate to produce more offspring over time, who also possess these traits.
b. For natural selection to act on a trait, it must confer a particularly beneficial advantage, and it should also be passed on to various offspring capable of surviving and reproducing at a higher rate. Without the ability to reproduce, natural selection cannot occur and is not influenced by an individual's fitness.
Natural selection leads to evolutionary change when individuals with certain characteristics have a greater survival or reproductive rate than other individuals in a population and pass on these inheritable genetic characteristics to their offspring.
Further Explanation:
Genetic variation has an important impact on small populations. There, mutations add up over time in a population, modifying the distribution of alleles or various forms of a gene. Natural selection may lead to loss of diversity in a population through genetic drift; one trait's allelic frequency increases significantly while others become less prevalent. Usually these differences exist because of occurrences of mutation and recombination.
Spontaneous changes within the genome occurring during the cycle of cell division are called mutations. These are defects of copies of the DNA produced within the cell; mutations may range from small modifications called single nucleotide polymorphisms to large-scale deletions and multi-gene additions.
Such mutations create variants which, within a group, become permanent, resulting in the creation of different, genetically distinct populations called species. Mutations occur over time in a population, changing the distribution of alleles or various forms of a gene-this is called genetic drift.
Learn more about mutations at brainly.com/question/4602376
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
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Answer:
Producers like plants get their energy from the sun. Consumers get energy from eating producers or other consumers.
Explanation:
Answer:
producers, primary consumers, secondary consumers and tertiary consumers
Explanation:
Producers get their nutrients by the sun, these are normally plants. Then primary consumers eat these producers, these are herbivores. The secondary consumers eat the primary consumers, these are carnivores and can be herbivores. Lastly, tertiary consumer eat the secondary consumers and are carnivores
When a cell with 18 chromosomes divides by meiosis, the result would be four daughter cells, each with 9 chromosomes, option(c). This is because meiosis reduces the number of chromosomes in each daughter cell by half.
The best description of the expected daughtercells when a cell with 18 chromosomes divides by meiosis is: The result would be four daughter cells, each with 9 chromosomes. This is because meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell. The process of meiosis begins with a parent cell that is diploid, meaning it has two complete sets of chromosomes. During meiosis, this cell undergoes two rounds of division, resulting in four haploid daughter cells, with each containing half the number of chromosomes as the original parent cell. In this case, the original cell has 18 chromosomes, so each of the four daughter cells will end up with 9 chromosomes, option(c).
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Question: A cell with 18 chromosomes divides by meiosis. Which of the following statements best describes the expected daughter cells?
a. The result would be two daughter cells, each with 18 chromosomes.
b. The result would be four daughter cells, each with 18 chromosomes.
c. The result would be four daughter cells, each with 9 chromosomes
d. The result would be two daughter cells, each with 9 chromosomes.
Answer: there are four daughter cells. Each daughter cell has different characteristics from the parent
Explanation: did it
Answer:
boron, silicon, germanium, arsenic, antimony, and tellurium.
A Domain
B Kingdom
C Genus
O D Species
Answer:
D Species
Explanation:
Living organisms have been organized into groups using the Kingdom to Species classification. Kingdom level represents the least specific while Species level represents the most specific. Prior to the discovery of DNA, classification of organisms has been based on structural similarities i.e. organisms that look similar are classified into the same species.
However, the discovery of DNA, put a stop to the erroneous classification of organisms based on structural similarities as there were many exceptions to this. Since members of the same species have a nearly identical DNA, it is used to divide its organisms based on DNA sequences
instead of structural similarities.
Crust
asthenosphere
mesosphere
its a drag and drop question to its right location.
Answer:
Physical Layers:
- Crust
- Mantle
Compositional Layers:
- Asthenosphere
- Mesosphere
Explanation:
Physical Layers refer to the layers of the Earth based on their physical properties such as their state (solid or semi-solid) and how they behave. The two primary physical layers are the Crust and Mantle.
- Crust: The Earth's Crust is the outermost layer, which includes the solid ground we walk on. It is relatively thin compared to the other layers and is where we find the continents and ocean floors.
- Mantle: The Mantle lies beneath the crust and is semi-solid, extending to a depth of about 2,900 kilometers (1,800 miles). It's responsible for the convective movement of the Earth's tectonic plates.
Compositional Layers, on the other hand, are based on the chemical composition of the Earth's interior. They include:
- Asthenosphere: The Asthenosphere is part of the upper mantle and is composed of partially molten rock. It's semi-fluid, allowing for the movement of tectonic plates. This is crucial for plate tectonics and the Earth's surface dynamics.
- Mesosphere: The Mesosphere is not typically considered a distinct compositional layer in the Earth, but rather part of the lower mantle. It consists of solid rock that behaves plastically, allowing for convection currents to occur deep within the Earth.