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Tresset [83]
3 years ago
5

What ignited the Cambrian explosion of life?

Biology
1 answer:
uysha [10]3 years ago
3 0
Increase levels of oxygen in seawater, evolution of eyes, origin of hard parts, and genetic changes
hope that helps <3
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Euglena is a unicellular organism with both chloroplasts and mitochondria. If scientists remove all of the chloroplasts from a E
katrin2010 [14]

Answer:

Euglena is a single celled organism. It belongs to Kingdom Protista. Euglena is  a eukaryotic organism that exhibit characteristics of both plants and animals. Some species of Euglena are photoautotrophs like plants which means they have ability to trap sunlight to produce food by the process of photosynthesis. Whereas, some species are heterotrophs like animals which means they obtain food by feeding on other organisms.

If scientists remove all of the chloroplasts from a Euglena, it will not be able to perform photosynthesis because chloroplast is an organelle that contains light sensitive pigments named as chlorophyll. Chlorophyll traps light energy from sun. Sunlight energy, along with carbon dioxide and water produces food in the form of glucose in plants and other photoautotrophs.    

4 0
3 years ago
What is the name of thespecific organelle that is studded with<br> ribosomes in a eukaryoticcell?
Alik [6]

Answer:

The (rough) endoplasmic reticulum

Explanation:

The endoplasmic reticulum is a system of interconnected membranes that functions in the synthesis of several membrane-related proteins and lipids. There are two types of endoplasmic reticulum in the eukaryotic cell;

  • Smooth endoplasmic reticulum
  • Rough endoplasmic reticulum

The smooth endoplasmic reticulum is actually smooth because it has no ribosome attachment while the rough endoplasmic reticulum appears rough due to the attachment by ribosomes.

<em>Therefore, the name of the specific organelle that is studded with ribosomes in eukaryotic cell is endoplasmic reticulum.</em>

5 0
3 years ago
Which end of the of water molecule attracts most electrons and acts<br> negative
irga5000 [103]
The answer is oxygen end, because the oxygen atoms attract electrons more strong than hydrogen atoms, because of unequal sharing of electrons gives the water molecule a small negative (-) charge close to its oxygen atom
4 0
3 years ago
A temperatura dos corpos que tocamos determina as nossas sensações de quente e frio. Um corpo
Luba_88 [7]
The answer is c i think
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3 years ago
Sometimes when a bee pollinates a flower, this action is beneficial to humans. Bees are the main pollinators of many plants that
r-ruslan [8.4K]

Answer: Ecosystem Services

Explanation: Simply put,Ecosystem services refer to all the benefits that man enjoys from his relationship with the ecosystem.Ecosystem services are the benefits that people obtain from ecosystems. Ecosystem services are indispensable to the wellbeing of all people, everywhere in the world. They include provision,regulation and cultural services that directly affect people, and supporting services needed to maintain the other services. From the availability of adequate food and water, to disease regulation of vectors, pests, and pathogens, human health and well-being depends on these services and conditions from the natural environment.

We depend on nature for our survival – without healthy ecosystems, our drinking water isn’t clean nor is the air we breathe. Studies also show that people who spend time in nature tend to be happier than those that don’t. Being outdoor can even act as a natural anti-depressant. With industry and urban sprawl expanding at unprecedented rates, Ecosystem Services attempt to translate the benefits we receive from nature into economic terms so we can better understand the compromise we are making between nature and industrial development.

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