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777dan777 [17]
3 years ago
8

All of the statements regarding the history of life on Earth are true except: Group of answer choices a) The history of planet E

arth includes alternations between colder periods ("icehouses") and warmer period ("greenhouses") on the surface of the planet b) The rise of more complex organisms such as eukaryotes has resulted in a reduction of diversity of more "primitive" organisms such as bacteria. c) There have been repeated incidents of mass extinction in the history of the planet in which species diversity has been reduced by 50% or more d) There is more oxygen in the atmosphere today than there was early in Earth history (4 billion years ago)
Biology
1 answer:
liq [111]3 years ago
3 0

Answer:

the correct answer is A

Explanation:

Option A is the one that is considered false since the warm stages that the earth goes through are called greenhouse stages, but the cold ones are not called in the same way but are called glaciation stages.

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if the ratio of the ages of kisii and esinam is 3:5 and that of Esinam and Larry is 3:5 and the sum of the ages of all three is
larisa [96]

Answer:

The age difference between the oldest and the youngest is 48.

Explanation:

Given the following data;

The ratio of the ages of Kisii (K) and Esinam (E) is 3:5.

The ratio of the ages of Esinam (E) and Larry (L) is 3:5.

The sum of the ages of all three is 147.

Since the age of Esinam is common in both ratios, we find the lowest common multiple (LCM);

LCM of 3,5 = 15.

Hence, the ratio of the three ages is now;

K:E:L = 9:15:25

Let their ages be denoted by x;

K:E:L = 9x:15x:25x

The sum of all three ages is;

9x + 15x + 25x = 147

49x = 147

x = 147/49

x = 3.

To find the age difference between the oldest and the youngest;

The oldest is Esinam = 25x

The youngest is Kisii = 9x

Therefore, 25x - 9x = 16x

Substituting the value of x, we have;

x = 3; 16x = 16(3) = 48.

The age difference between the oldest and the youngest is 48.

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