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exis [7]
3 years ago
10

Using an electron microscope, a scientist identified these cell structures in an unknown organism: mitochondrion, nucleus, cell

wall, and chloroplast. What kind of organism did the scientist find?
Biology
1 answer:
Helen [10]3 years ago
7 0
It would be a plant cell. Only plant cells have cell walls and chloroplasts.
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In the past, the parathyroid glands were sometimes mistakenly removed during surgery when another part of the body was removed.
lukranit [14]

Answer:

Thyroid gland

Explanation:

Parathyroid glands are the endocrine glands and are four in number. One superior and one inferior parathyroid glands are attached to each lateral lobe of the thyroid gland. These glands are found embedded in the tissues of the lateral lobes of the thyroid gland. During the removal of thyroid glands in patients, parathyroid glands may be mistakenly removed.

3 0
3 years ago
Does social distancing increase or decrease your carbon footprint?
Andrej [43]

Answer:

Decrease

Explanation:

The carbon footprint is <u>the amount of carbon (in terms of greenhouse gases) being emitted by human activities</u>. In a situation where <u>social distancing is encouraged, human activity would reduce significantly</u>. Very few people will be outside and the causative agents of pollution (anthropogenic) will be significantly reduced. Further, nature would be able to minimize the impacts of pollution when human activities are less than the threshold capacity.

Let's take an example of coronavirus spread globally this year. The social distancing of 2 meters has significantly reduced the number of people going outside. Ultimately, there are fewer automobiles on the roads and a few industries are running. The result is that the air quality index has been significantly improved. For example, in India, people from 300 km away, can see the Himalayan mountain range very clearly (see image attached). This has not happened in decades after modern industrialization.

4 0
3 years ago
The layer of the atmosphere where most of our weather occurs is called
taurus [48]
The layer of the atmosphere where most of the weather happens is called the troposphere.
4 0
3 years ago
Describe how the functional units for beta carotene, xanthophyll, chlorophyll a, and chlorophyll b are different. be sure to ide
leonid [27]

The pigments have a similar structure of 40 carbon atoms covalently bonded in a chain. Carotenoids contain oxygen atoms in their chemical structure (retinyl functional group) while xanthophyll does not. This makes carotenoids more non-polar compared to xanthophylls, hence move farthest in chromatography paper using a nonpolar mobile phase. Chlorophyll pigment, on the other hand, has chlorin rings (which are larger) as functional units hence move slowly in chromatography.

Photosynthetic rates can be measured by either the amount of oxygen they consume per particular time period or the amount of carbon dioxide produced per particular time period. This is conducted while immersed in water so as to measure bubble rate formation in case of oxygen production or the change in water pH in the case of carbon dioxide consumption.

When autumn approaches, the amount sunlight received by the plant is reduced due to longer night than days. Deciduous trees have adapted by losing chlorophyll a and b pigments (most important in photosynthesis) during this time. This leaves a higher amount of the other red and yellow pigments hence making the leaves change from green to yellow-red.

It is believed that this is the result of an ancient endosymbiotic relationship between a protist and a eukaryotic cell. The protist generates energy that the eukaryotic can utilize in its growth and reproduction while the protist is sheltered. This relationship became obligatory symbiosis over time.






8 0
3 years ago
What is the goal of technology?
Lapatulllka [165]

Answer:

The correct answers is D

7 0
3 years ago
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