Matching coastlines and land formation created by glaciers are the two evidence that suggests that Africa, Antarctica, South America, India, and Australia formed Gondwana land 200 million years ago
Further Explanation:
Earth is being marked by almost five ice ages namely Huronian, late Paleozoic, Andean- Saharan, Cryogenian, and the latest one Quaternary Ice age. Well established earliest ice age rocks are called Huronian that is expected to be formed around 2 billion years ago during Proterozoic eon. Cryogenian has existed around 700 million years ago while the late Paleozoic age existed around 300 million years ago. Though the glacial period ended 8,000 years ago its effect is felt still today as its weight was so great that it led to the deformation of earth’s crust and mantle. During deglaciation sea level also rose and that resulted in the sudden shifting of the hydration system and coastline.
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Answer Details:
Grade: High School
Subject: Biology
Topic: Ecology
Keywords:
Huronian, Andean, Saharan, ice, age, shifting, coastline, hydration, earth, Paleozoic, age, glacial period, rose, weight, huronian, deformation, earth crust.
Answer:
An increase in membrane thickness
Explanation:
Gaseous exchange occurs in relation to Fick's Law which states:
'the rate of diffusion is proportional to both the surface area and concentration difference and is inversely proportional to the thickness of the membrane
Therefore, based on this law, an increase in the thickness of the membrane will result in a decreased diffusion rate which will in turn slow down the process of gaseous exchange
Answer:
Endosymbiotic theory explains that at a certain point of evolution both mitochondria and chloroplast (cyano bacteria) existed independently as prokaryotic organisms. Which were "engulfed" by eukaryotic cells but instead of being consumed a symbiotic association was developed between the cells, which over various stages of evolution became components / organelles of the eukaryotic cell due to migration of some prokaryotic genes to the eukaryotic nucleus. However, they retained their capacity of duplication due to presence of circular DNA
So, the correct answer is'The mitochondria and chloroplast have their own DNA'
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Answer:
Either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.