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myrzilka [38]
3 years ago
9

All vertebrates have ear-like structures to hear. True False

Biology
1 answer:
Gekata [30.6K]3 years ago
4 0
False. Some vertebrates like fish and snakes have none. 
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The process in which the floors of a building collapse on one another is known as
dimaraw [331]
The process in which the floors of a building collapse on one another is known as a pancake collapse. This will make the correct answer here B, pancaking.
4 0
2 years ago
Which is NOT a defining characteristic of a mineral?
notka56 [123]

Answer:

minerals are not man-made. They are naturally occurring. Minerals concocted in the the lab do not count although there are about 208 man made minerals discovered around mines

8 0
3 years ago
Strontium-90 has a half life of 29 years, how much strontium-90 is left from the Chicago pile reactor that was active around 87
agasfer [191]

Answer:

The answer is below

Explanation:

The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:

N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\where\ N(t)=quantity\ of\ substance \ remaining, N_o=initial\ quantity\\of\ substance, t=time\ and \ t_\frac{1}{2}=half\ life\ of\ substance

Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:

N(t)=N_o(\frac{1}{2} )^\frac{87}{29} \\\\N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\N(t)=N_o(\frac{1}{2} )^3\\\\N(t)=\frac{1}{8} N_o

That is one-eight of Strontium 90 would be left after 87 years

6 0
2 years ago
What are the 3 common categories of lipids
kobusy [5.1K]

Answer:

monogliceridos

digliceridos

trigliceridos

Explanation:

Según el número de ácidos grasos, se distinguen tres tipos de estos lípidos: los monoglicéridos, que contienen una molécula de ácido graso. los diglicéridos, con dos moléculas de ácidos grasos. los triglicéridos, con tres moléculas de ácidos grasos.

8 0
1 year ago
Read 2 more answers
What structure does annelids use?<br> (In your own words)<br> I’ll mark you as brainliest!!
vekshin1
The structures that annelids use are palps, antennae, eyes, statocysts, nuchal organs and lateral organs.

I hope this helps.
7 0
2 years ago
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