<em>A natural disaster. </em>
Explanation:
A natural disaster would most likely have occurred to have the population of squirrels completely diverge from each other in order for them to become two separate species.
If a tornado, flood, earthquake, or another type of a natural disaster were to happen, it may have caused drastic damage to the ecosystem and environment of the squirrels. This would most likely cause the squirrels to split up, or diverge from each other and go to separate places in search of a new home.
Over time, these squirrels will reproduce with their own group. Each new group of squirrels, as they are both in different environments now, will have different adaptations from each other. This will eventually make it so they will never be able to reproduce with each other again if they were to meet, as they are now completely different species of squirrel.
Answer:
B) cryptic coloration
Explanation:
The plants have developed numerous different types to protect themselves from the herbivores because they tend to damage them or even totally destroy them. The development of certain chemicals that are unpleasant or poisonous for the herbivores is one of the defense mechanisms, like the development of nicotine or the highly toxic strychnine. Also, physical defense mechanisms that hurt the herbivores like the spines or thorns have been developed, making the herbivores think twice before they try anything as they can get hurt because of them. The cryptic coloration though is not a defense mechanism of the plants, but instead it is a defense mechanism that is used by the animals. This type of coloration is protecting the animals as it managed to blend them in with the environment, thus it is very hard to spot them, or it makes their shape much different in the eyes of the predators thus confusing them.
Answer:
sepals
Explanation:
sepals protect inner floral leaves in bud stage of the flower, carry out photosynthesis, attract animal pollinators when petaloid (have same color with petals eg in pride of barbados)
Backcross, the mating of a hybrid organism, offspring of genetically unlike parents,with one of its parents or with an organism genetically similar to the parent.
Answer:A. Protists B. Bacteria C. Animals D. Plants E. Fungi F. Archaea
Explanation:viruses are small non-living particles that contains hereditary materials.viruses attack cells of other organisms such as plants , bacteria ,archaea etc.
Viruses are acellular and contains either DNA or RNA.they cannot synthesis protein as they lack ribosomes ,so they use the ribosomes of the cell they have invaded to synthesize they proteins they need.
A virus usually has a central core surrounded by an outer protein coat called capsid.
Viruses can reproduce only within the living host cells and they are specific to the type of cells they attack.they attack plants through insect vectors or through openings on the plants.
Viruses can affect bacteria by injecting their nucleic acids through the cell wall and into the bacteria cell.such viruses are called bacteriophages.
