Answer:
Explanation:
Parasitism, in biology, is defined as a relationship between different species, formed by a parasite and a host. So, basically the parasite lives in or on the host, causing it harm. Parasites can be describe as predators that eat less than one prey unit, that is, they feed them selves slowly, they don't kill the prey instantly as actual predators do.
So, in this case, we are talking about leeches, which are defined as parasitic worms which lives in freshwater environments. They feed themselves by sucking blood from the host.
Therefore, the relation between these two species is Parasitism.
The top of the wavelength is called the crest.
-- The arrow in the picture is pointing to a crest of the wave ... one of the peaks.
-- The amplitude of the wave is the vertical distance between one of the crests and the light horizontal line across the middle.
-- The wavelength is the horizontal distance between two crests.
-- Do you know what a 'trough' is ? Well first of all, when you read the word, it looks like you should pronounce it like "trow", but the correct pronunciation is "trawf". (Just like when you have something stuck in your throat, and you cough ... you don't "cow", you "cawf".)
In an old cowboy movie, do you remember the big, open water tanks they used to have along the side of the street in front of the saloon, for horses to drink from while they were tied up to the hitchin post ? THAT tank was called a "watering trough". The bottom of a wave, where the wave could hold water, is the trough of the wave. It's an upside-down crest.
Answer:
The velocity of the sound waves across the plains of Sneedville is 500 m/s.
Step-by-Step Explanation:
Distance travel by the screech of Sneetches = d = 250 m
Time taken to cove 250 meters = t = 0.50 s
Let the velocity of the sound waves be v, such that:
v = d/t
⇒ v = 250/0.5
⇒ v = 500 m/s
B They evolve more quickly than native species.
C They have higher reproductive rates than native species.
D They have no population controls such as predators.
Answer:
Option (C)
Explanation:
Invasive species usually refer to those species that are new to an ecosystem and cause a great impact on the native species. It also affects the ecosystem, economy and the health of human beings. Examples of some invasive species are zebra mussels, killer algae, green crab and Asian carp.
These species are much stronger than the native species and they have the ability to grow at a much faster rate, increasing their population. This increasing rate of population creates a problem for them to survive in a new location.
Thus, the most appropriate answer is option (C).
Answer:
D
Explanation:
The other species had evolved to be able to survive the predators of the area over the years