One question about echolocation abilities is whether dolphins have to wait for an echo from one click to come back to them before they can send out the next echolocation click. The amount of time between clicks is
called the interclick interval (ICT). To gather information about the environment or their prey. dolphins send
they should click again as soon as the echo returns (after a very short <0.1 second time for the brain to
process the click). If dolphins can send out a second click before the echo of a first click gets back to them,
then the ICI should be less than the round-trip time for a single click
Table 3. Interclick Intervals (IC) of Bottlenose Dolphins in Shark Bay Echolocating on Objects at different
Distances
Individual
ICI (sec)
Distance of object
(m)
Round-trip time
for single click
(sec)
1
2
3
5
6
7
8
9
10
1.01
0.10
0.28
0.53
2.01
0.20
0.01
0.02
0.13
0.03
750
75
200
400
1,500
150
7.5
15
100
25
7.
Calculate the round-trip time for a single click for each individual in Table 3. Remember, an echo has
to travel to an object and then all the way back before a dolphin hears it.

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

correct answer: false

while planning water activities, it is very important to consider the weather, because if we do not plan and are going for a surf, then it might be that the hurricane came and drown us or may carry us to long distance from where we can not come back. there are many reasons to take information about the weather when we are planning any water activities.

hence, the correct answer would be false.