BIOLOGY HIGH SCHOOL

Many scientists suggest that billions of years ago,life on Earth began with
(1) simple, single-celled organisms
(2) simple, multicellular organisms
(3) complex, single-celled organisms
(4) complex, multicellular organisms

Answers

Answer 1
Answer:

Many scientists believe that life on Earth started with simple, single-celled organisms. Therefore, the correct statement is option A.

What are single-celled organisms?

Single-celled organisms are unicellular organisms that contain only one cell and form the most ancient part of life. They can be prokaryotic or eukaryotic organisms.

Life on earth began with simple, single-celled organisms which are usually prokaryotes, such as bacteria and constitutes the most abundant type of organisms on earth. Prokaryotes lack a nucleus and membrane-bound organelles.

By this time, these single-celled organisms evolved to form more complex organisms. Multicellular organisms first evolved around 1 billion years ago, but they are still considered simple to the organisms present today.

Therefore, simple, single-celled organisms are the first to live on earth billions of years ago.

Learn more about single celled organisms here:

brainly.com/question/29188904

 

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Answer 2
Answer: i think your anwser would be all of the above but you don't have it

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True or False earthquake always occurs where there is a build up of friction along a fault?

Answers

True. Earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. This reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. These are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.

The answer is: True) because earthquakes are cause by this friction build-up near the fault

Which temperature scale was used if your body temperature was 37 degrees?A. Kelvin
B. Fahrenheit
C. Newton
D. Celsius

Answers

Answer:

D. Celsius

Explanation:

Temperatures up to 37.3 and down to 36.7 are considered to be within the normal body temperature scale in Celsius.

Answer: D

i hope i answered your question.

(1 pt) Which of the following is one way that the circulatory system helps maintain body temperature? A. carrying heat around the body B. controlling the flow of blood to the skin C. carrying nutrients and energy to cells D. speeding up the blood flow to generate heat

Answers

The right answer is B. controlling the flow of blood to the skin

When the body temperature is below the set point, the hypothalamus activates several thermogenesis mechanisms:

* Vasoconstriction on the vessels near th skin by the sympathetic nervous system to reduce thermal exchanges between the skin and the surrounding environment.

* And increase in heat production:

-by muscular activity:

-by the metabolism:

Answer:

B

Explanation: Just took a test that had this exact question, and I made a 100%

Organisms need _____ to conduct essential life activities

Answers

Answer:

organisms need ENERGY to conduct essential life activities

Explanation:

organisms need energy to digest, use the restroom, eat, even standing up requires energy!
Organisms need energy to conduct essential life activities.

What value does the prefix milli stand for

Answers


it is thousandths

0,001

List and describe two ways that scientists can date fossils found in the earth.

Answers

Answer:

relative and absolute dating

Explanation:

Two methods of dating fossil fuels are -

a) Relative Dating  and b) Absolute Dating

a) Relative Dating - In this method,  unknown age of fossil A is determined by comparing it with the known age of fossil B via correlation . Such " fossils B" are known as index fossils. These index fossils belong to a specific age group.

Some common example of index fossils are -

brachiopods,

trilobites, and

ammonites

b) Absolute Dating - In this method, the age of rock is determined through radiometric dating methods. Here, instead of dating the fossil itself, the rock or volcano layer above and below the fossil is dated for determining a rage of date.

First, they can describe how old fossil is by just looking at the layer where the fossil remain, the deeper the fossil, the longer the time way back that organism has live.

Second, Radiometric Measuring, is how they calculate how the fossil has been decays over time.
 Hope this help.
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