Answer:
A. Parasitism, because the flee is benefitting and the mammal is harmed.
Explanation:
Parasitism is when one organism which is a parasite lives on another which is the host, and gaining benefits from it and at the same time maiming havoc to it. Parasitism is common among living organisms. Animals are most times the host to a range of parasitic organisms which include viruses, bacteria, fungi,protozoa, also flea, tick, mites etc.
Parasites like fleas, tick and leeches live on the body surface of their host, which is make them ectoparasites while those that live inside their hosts are endoparasites.
Answer:
Charles Darwin had a theory that states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. ... As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.
Freshwater ecosystems have been modified by the creation of dams and the withdrawal of water for human use, which have changed the flow of many large river systems. This in turn has had other effects such as reducing sediment flows, the main source of nutrients for estuary ecosystems.
Within terrestrial ecosystems, more than half of the original area of many types of grasslands and forests has been converted into farmland. The only types of land ecosystems which have been changed relatively little are tundra and boreal forests, but climate change has begun to affect them.
The distribution of species on Earth is becoming more homogenous. By homogenous, we mean that the differences between the set of species at one location on the planet and the set at another location are, on average, diminishing. The natural process of evolution, and particularly the combination of natural barriers to migration and local adaptation of species, led to significant differences in the types of species in ecosystems in different regions. But these regional differences in the planet’s biota are now being diminished.
Non-native species
Figure 1.7 Non-native species
Two factors are responsible for this trend. First, the extinction of species or the loss of populations results in the loss of the presence of species that had been unique to particular regions. Second, the rate of invasion or introduction of species into new ranges is already high and continues to accelerate apace with growing trade and faster transportation. (See Figure 1.7.) For example, a high proportion of the roughly 100 nonnative species in the Baltic Sea are native to the North American Great Lakes, and 75% of the recent arrivals of about 170 nonnative species in the Great Lakes are native to the Baltic Sea.
When species decline or go extinct as a result of human activities, they are replaced by a much smaller number of expanding species that thrive in human-altered environments. One effect is that in some regions where diversity has been low, the biotic diversity may actually increase—a result of invasions of nonnative forms. (This is true in continental areas such as the Netherlands as well as on oceanic islands.)
hope this helps im not sure it will
What products to make > there is a demand for more sedans
How to produce them > it’s cheaper to manufacture cars in Asia
Who should receive the goods > most working adults in urban areas
Answer:
Here's what I get
Explanation:
If the orbital is 5d, n = 5 and l=2.
mₗ = -l, -l + 1, -l + 2, …., l
(mₛ is a quantum number for electrons)
Thus, we can have the following combinations.
That makes a total of five 5d orbitals.
The pictures below show what two of them look like.
