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n200080 [17]
3 years ago
8

For what purpose is the mineral corundum commonly used?

Biology
1 answer:
prohojiy [21]3 years ago
5 0

Answer:

D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.

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Can someone help me on those questions
Inessa05 [86]
1). A good example for mutualism is People and plants.  We provide plants Carbon dioxide.  Plants provide us Oxygen 
2).Biome is where you have your tundras, Rain forests, Deserts, etc.  then you have to give 3 characteristics like temperature, precipitation levels, soil type, etc.
I will have to get to question 3 later since im in class but ill give you the answer to that one.  its easy
5 0
3 years ago
During embryonic development, the vertebral column is replaced by the notochord.
Reptile [31]

Hello! The answer is false.

It is actually the opposite. The notochord is a primitive axial skeleton, and in humans, it disappears. It eventually becomes part of the vertebral column, which is the backbone that we have today.

Hope this helps!

3 0
3 years ago
In the Arroyo Seco, the Western Toad feeds on beetles, bees, and small aquatic insects. The Bull Frog has been introduced and ea
PilotLPTM [1.2K]

Answer:The based on this information interaction between these two species can best be described as COMPETITION. Correct option is B

Explanation:

Competition occurs between two species that shares the same requirements ( especially food) for survival.

Both the Western Toad and the Bull Frog has a similar niche because they require the same type of food (beetles, bees, and small aquatic insects) to survive in the environment of Arroyo Seco. Only one of the species will coexist in that environment and it's usually the survival of the fittest.

This explains the competitive exclusion principle proposed by Georgii Gause in 1934.

8 0
3 years ago
What is the relationship among genes, chromosomes, and DNA?
horsena [70]
Chromosomes makes up genes while genes and chromosomes make up the entirety of DNA. A living organism inherits 46 chromosomes, 23 from each parent. These chromosomes are not genes but they form genes, which are just the traits of an individual that are unique. DNA is the entire make up of an organism that controls everything about a person such as likelihood to have disease or their physical appearance.

please vote my answer brainliest. thanks!
4 0
3 years ago
Complete the paragraph on freshwater ecosystems by using the following terms: merge, mountain streams, oxygen, plankton, plants,
ddd [48]

Answer

Answer:

Rivers often start from the mountain streams and contain high amounts of oxygen. Rivers and streams grow larger as these waters merge. Rivers pick up sediments from the land as they flow. Lakes support many varieties of organisms, including plants in shallow,

3 0
3 years ago
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