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Anvisha [2.4K]
2 years ago
8

When did the archean era begin

Biology
1 answer:
victus00 [196]2 years ago
4 0

Answer:

about 4 billion years ago

During the beginning of the Archean Eon, about 4 billion years ago, as the frequency of meteorite impacts slowed, the Earth cooled, clouds formed, and the crust began to harden from the molten globe. The Earth was still a one-plate planet before the inception of plate tectonics.

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Julio is studying the evolutionary history of desert cottontail rabbits, sea otters, and grizzly bears. All three species share
krek1111 [17]

Answer:

One way that Julio can explain such differences is that their environments are very similar and therefore the traits that were best suited for their survival were passed on from generation to generation. The traits that each species developed differently would have been due to their diet. Each species has a different diet and certain traits allow them to more easily hunt/gather the food that they need to survive. For example, grizzly bears and sea otters both eat fish as their main diet and therefore have both developed canine teeth, while rabbit teeth are different due to them only eating vegetation.

Explanation:

8 0
3 years ago
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Look at the data tables below. Which would most likely produce a nonlinear graph? 
lora16 [44]
Table 3

A linear graph is one where there is a steady change in the value on the y-axis with a steady change in the value on the x-axis. The first table will produce a positive sloped straight line that has an increase of 5 in the value of distance with each increment in the time value.
Table 2 will produce a graph where there is a decrease of 2 in the value of distance with an increase in the value of time.
Table 4 will produce a graph where the line is horizontal; the y-value does not change with time.

Table 3 has a graph which has to move up and down to accommodate the decreasing and increasing values, so it will be non-linear.
7 0
3 years ago
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What is the term for an organism that makes its own food?
Black_prince [1.1K]

Answer:

An autotroph

Explanation:

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Describe the food chain plant&amp; grasshopper snake _______<br>​
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Answer:

plant-grasshopper-snake-Eagle

3 0
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The molecular basis of the Gram stain is the amount of _______ in the bacterial cell wall. bacteriophage spirochete peptidoglyca
Anna11 [10]
<h3><u>Answer;</u></h3>

peptidoglycan

The molecular basis of the Gram stain is the amount of<u> peptidoglycan</u> in the bacterial cell wall.

<h3><u>Explanation</u>;</h3>
  • Gram stain is differential stain that is very useful for identifying and classifying bacteria as either gram negative or gram positive.
  • Gram negative are those that decolorize easily, such as E. coli, while Gram positive are those that retain the primary stain and do not decolorize easily.
  • The result depends on the bacteria cell wall structure, the cell wall of a Gram-negative bacterium is composed of 20 percent or less of peptidoglycan.
6 0
3 years ago
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