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Lilit [14]
3 years ago
15

When does crossing over occur in meiosis?

Biology
1 answer:
KonstantinChe [14]3 years ago
7 0
I think
It’s B but I’m not sure
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Toxic pesticides, smoke, and other emissions into the air can change the local weather patterns.
Lorico [155]
Very true.
It harms our atmosphere, thus effecting climate. Which can kill and sometimes nearly cause organisms to go extinct. It corrupts our air, which is very unhealthy, and can cause lung cancer, and harm our breathing patterns. Which can shorten life expectancy.

Stay clean, and I hope this helps! :) <span />
6 0
3 years ago
What do enzymes change to affect the chemical reactions that take place in living cells?
diamong [38]
Enzymes are biological catalysts.They lower the activation energy necessary for the reaction to occur, and that makes the chemical reactions quicker in living cells.
5 0
3 years ago
Which class of macromolecules is primarily used as rapidly available energy sources by living thing?
Dmitry_Shevchenko [17]

Answer:

The correct answer is - carbohydrates.

Explanation:

The four significant groups of macromolecules found in living beings are carbohydrates, lipids, nucleic acids, and proteins. carbohydrates comprised of carbon, hydrogen, and oxygen molecules, generally in a proportion of 1 : 2 : 1.

Living things use carbohydrates as their main form of energy.  Carbohydrates are a class of macromolecules is essentially utilized as a quickly accessible energy source by living things.

Thus, the correct answer is - carbohydrates.

7 0
3 years ago
Discuss and provide examples of each of the terrestrial biomes.
Juli2301 [7.4K]

Answer: There are eight types of terrestrial biomes - temperate grasslands, temperate forests, tropical rainforests, subtropical rainforests, savannas, subtropical deserts, chaparral, boreal forests and arctic tundra.

Explanation: A terrestrial biome can be defined as an area of land that have similar communities of plants and animals and also similar climate.

Temperate grasslands: The climate temperature varies from semi-arid to semi-humid. Vegetation consist of grass and/or shrubs. Example includes  Eurasian steppes, north american prairies.

Temperate forests: It is second largest biome , which covers 25% of the world's forest area. Its is known for its seasons and leaf-shedding trees. For example the Valdivian and magellanic temperate forests.

Tropical rainforests: It occurs in the areas of tropical climate. There is no dry season. Average precipitation of the year is at least of 60 mm. For example Daintree rainforests, Congo rainforests.

Subtropical rainforests: It has the the features of temperate forests and tropical forests.

Savannas: It is a mixed woodland grassland ecosystem. Tress are widely spaced so that canopy does not close. For example Serengeti plains of Tanzania.

Subtropical desert: High temperature, warm soils, and very low precipitation are its important features. Plants such as shrubs and succulents can be found there. Mojave desert, Sonoran are the examples.

Chaparral: It is a heathland plant community. Found mainly in US state of California and in northern portion of the Baja California peninsula. For example Santa ynez mountains, near Santa Barbara, California.

Boreal forests: It is also known as Taiga. It has coniferous forests consisting mainly of spruces, larches and pines. It is world's largest forest. For example Jack London Lake in Russia.

Arctic tundra: It is a vast, cold, and treeless area of low, swampy plains in the north around Arctic ocean. There are three regions and associated type of tundra that are Arctic, Antarctic and Alpine.

5 0
2 years ago
Please help me, In your opinion ( I'll give Brainliest):
MrMuchimi

I think this depends on you  because it your choice for yourself but I'll just state some information or facts about this career.

  • The field is a specialization in biomedical engineering that can take four to eight years to master.
  • Genetic engineering has been applied in numerous fields including research, medicine, industrial biotechnology and agriculture. In research GMOs are used to study gene function and expression through loss of function, gain of function, tracking and expression experiments.
  • Success rates are incredibly low; on average, less than 10% of embryos survive to birth and a smaller percentage of those born survive to adulthood.
  • The field of genetics allows you to work in medical as well as scientific research.
  • To become a genetic engineering research scientist, you need a doctoral degree in a biological science.
  • Genetic engineers can earn anywhere from $44,320 to $139,440 a year.

Hope this helps and if you could mark me as brainliest. Thanks!

6 0
2 years ago
Read 2 more answers
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