Answer:
A separation of a species or population so that they no longer interbreed and evolve into two separate species.They must mate with other species; the gene pools of two populations must become separated, or reproductively isolated.
Explanation:
The structures of the respiratory system interact with structures of the skeletal, circulatory, and muscular systems to help you smell, speak, and move oxygen into your bloodstream and waste out of it.
Two examples of related organisms are dinosaurs/chickens, and the megalodon/the great white shark.
<h3>How have organisms evolved?</h3>
Life emerged on our planet 3.7 billion years ago, and since then organisms have evolved or changed over time this includes:
- The appearance of more complex organisms, which is the result of natural selection.
- The diversification of organisms.
- The extinction or disappearance of species.
This has caused all organisms that exist today to be related to other organisms of the past. Let's examine two examples.
<h3>Dinosaurs and chickens: </h3>
According to scientific research, birds evolved from dinosaurs. Indeed, it has been determined birds started with theropods, which were a specific group of dinosaurs.
This means modern birds including chickens are related to this group of dinosaurs, even if overtime birds have evolved a lot and they might not seem to be very similar to dinosaurs.
<h3>The megalodon and the great white shark:</h3>
These two species of shark likely share a common ancestor and due to this, both species have many similarities such as the shape of their teeth. However, megalodons are extinct, while great white sharks still exist today.
Learn more about evolution in: brainly.com/question/2725702
Answer:
Proteins
Explanation:
These are all examples of proteins
As a protein, insulin is made up of two chains A and B each of these chains have 21 and 30 amino acids.
As a protein, haemoglobin has 4npolypeptides chains. Each of these chains have greater than 140 amino acids. The chains are attached to a heme group.
Albumin is also a protein. It's composition is about 69% of blood protein. It is made by the liver.
Maltose is a disaccharide
Firstly the question is incomplete as an option is not there.
Why do the number of organisms in a group change from the first step to the last step of a dichotomous key?
a. The number of organisms decreases because the number of common characteristics of the organisms in a group increases.
b. The number of organisms increases because the number of common characteristics of the organisms in a group increases.
c. The number of organisms is cut in half because the number of common characteristics of the organisms in a group decreases by half in the last step.
d. The number of organisms stays the same because the number of common characteristics of the organisms in a group decreases by half in the last step.
The correct answer is B. The number of organisms increases because the number of common characteristics of the organisms in a group increases.
The most common key for the identification of organisms is a dichotomous key, the number of organisms in a group change from the first step to the last step of a dichotomous key as the no. of organisms increases and forms several groups of species and genus.
<h3>What is the use of the dichotomous key?</h3>
The use of dichotomous keys are :
- contrasting characters
- dividing organisms
- eliminating .
Hence concluded that the dichotomous key has a number of organisms increases because the number of common characteristics of the organisms in a group increases.
To learn more about dichotomous keys refer to the link :
brainly.com/question/1281957
