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spin [16.1K]
3 years ago
13

The fossil record shows life originated on Earth at least 3.5 billion years ago and consisted entirely of microorganisms. Paleon

tologists provide the strongest evidence of this conclusion through the discovery of:______.
Biology
1 answer:
klio [65]3 years ago
3 0

Answer:

stromatolites

Explanation:

Stromatolites or stromatoliths are layered mounds, columns, and sheet-like sedimentary rocks that were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe. Fossilized stromatolites provide records of ancient life on Earth.

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In each generation, the wings of experimental fruit flies were clipped short for fifty generations. The fifty-first generation w
Rufina [12.5K]

N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on

a. inheritance of natural variations

b. inheritance of acquired characteristics

c. natural selection

d. survival of the fittest

Inheritance of acquired characteristics. Thus, option "B" is correct.

<h3 /><h3>What is inheritance of acquired characteristics?</h3>

For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.

Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution

To learn more about genetic variation click here:

brainly.com/question/848479

#SPJ1

3 0
1 year ago
Lichen growing on newly formed lava beds is an example of _____.
USPshnik [31]

Answer:

answer, I guess, is C.primary succession

8 0
3 years ago
Which factors are included in watershed conservation? Check all that app
fomenos

Answer:

A, B, D & E

Explanation:

Watershed conservation aims to protect wildlife in the watershed, restore vegetation, keep the watershed environment healthy, and in very dire cases may even have to relocate the watershed to a less polluted area

7 0
3 years ago
Read 2 more answers
How do sulfur and phosphorus move from the biotic to the abiotic pools during their cycles? A) Primary consumers eat producers.
worty [1.4K]

Answer:D) Decomposers break down the remains of producers and consumers

Explanation:A biotic pool is a tidal pool with diverse and changing habitats of living factors. We can say they are important mini ecosystems within the larger ecosystem.

The abiotic pool involves the elemental phases of nature,the non living parts of the ecosystem. Decomposition (break down) of elements/organic compounds is the characteristic bridge between both pools into what is known as nutrients.

This tell us that the ultimate dead part of producers and consumers are used up in this process.

Some of the nutrients released in the biogeochemical cyclic process includes sulfur and phosphorus and they move through the ecosystem.

Note: The biogeochemical cycle is a pathway of movement for chemical elements.

The chemical elements in nature moves through both biotic and abiotic components via abiotic and biotic interaction in the ecosystem

Few abiotic factors includes rocks, air, water, and chemicals while biotic factors includes living organisms activities.

All living and non living elements of nature play vital roles in the great biogeochemical cycle.

4 0
2 years ago
______________ tissue makes up a root organ
VikaD [51]
Xylem tissue makes up a root organ
3 0
2 years ago
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