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exis [7]
3 years ago
15

!!!!!!H-E-L-P!!!!!!!!!! How do index fossils help scientists establish how old rocks and other fossils are? In your answer, incl

ude fossils in the same layer of rock, in a lower layer of rock, and in a higher layer of rock compared to an index fossil.
Biology
1 answer:
ratelena [41]3 years ago
3 0

Answer:

safari could help, learnt this a few years ago, totally forgot!!

Explanation:

:).

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Why shouldnt you move the objective lense towards the stage when focusing
lys-0071 [83]
REMOVING THE SLIDE FROM UNDER HIGHER POWER OBJECTIVES MAY CAUSE THE SLIDE SURFACE TO HIT THE OBJECTIVE LENS SINCE THE LENS IN THESE OBJECTIVES WILL BE VERY CLOSE TO THE SLIDE. THIS COULD RESULT IN DAMAGE TO THE LENS. b. TO ACHIEVE THE HIGHEST POSSIBLE RESOLUTION WHEN VIEWING THROUGH THE HIGHEST POWER OBJECTIVES.
8 0
3 years ago
Autotrophs can be classified into two groups according to which of these properties?
ahrayia [7]

Answer:

a.energy source ,either sunlight or chemicals

Explanation:

the animals using sunlight are known as photoautotrophs and the animals using chemicals are known as chemoautotrophs.

6 0
3 years ago
A single strand of DNA helix has the code CGCTAA. Which would be the complementary code on the other strand of the helix?
Yakvenalex [24]

The correct answer is option 4, that is, GCGATT.  

Complementary strand refers to either of the two chains, which forms a double helix of DNA, with corresponding positions on the two chains comprising of a pair of complementary bases. It is a section of one nucleic acid, which is bonded to another by an alignment of base pairs.  

In nature, complementarity refers to the base principle of DNA transcription and replication as it is a characteristic shared between the two RNA or DNA sequences, such that when they are arranged antiparallel to each other, the nucleotide bases at each position in the sequences will be complementary.  


7 0
3 years ago
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Which of the following is an example of an indirect observation?
Neko [114]

Answer:

all of them okay!!!!!!! all of them !!!!!!!!!!

Explanation:

7 0
3 years ago
What do scientist use to learn about Earth's core
Viefleur [7K]

he outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth's solid inner core and below the mantle. Its outer boundary is 2,890 km (1,800 mi) beneath the Earth's surface.

3 0
3 years ago
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