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expeople1 [14]
3 years ago
5

!!!!Someone help me with this!!!

Biology
1 answer:
alexgriva [62]3 years ago
6 0

4. Cell wall, chloroplast and plastids

5. Plasma membrane, ribosomes, cytoplasm and DNA

6. Eukaryotes have a nucleus while prokaryotes don’t have one

7. Nucleus controls/regulates cell’s activities.

Nucleus consists of nuclear membrane, nucleoplasm, chromatin fibers, nucleolus and endosomes

I’m not sure how to answer the last question

Sorry if any answers are wrong

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Identify the molecule that allows "complex chemical reactions to occur"?
horrorfan [7]
Crossing over at prophase I results in the linked genes (those on the same chromosome) becoming unlinked and separated. Prophase I is this first stage of meiosis, the chromosomes condense, form tetrads, and exchange DNA. The nucleolus and nuclear envelope disappear.
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3 years ago
Effects of pollution might includea. inability to see the top of skyscrapers because of the smog.b. acid rain-induced destructio
poizon [28]

Answer:

e. all of these answers

Explanation:

Air pollution in addition to affecting people, animals, plants and goods, causes other problems related to the changes that occur in its composition, such as: climate change, acid rain and the destruction of the ozone layer phenomena that affect the planet globally and that it is necessary to stop urgently by taking the necessary measures.

Main effects of pollution:

- Effects on human health : It is difficult to determine the exact relationships between exposure to air pollution and diseases developed in humans, especially in the long term, they are not known exactly, but there is evidence that high concentrations of pollutants in the atmosphere are a danger for the human being.  it can also act as a vector to spread diseases

- Effects on the environment :

It is in the natural environment where the first signs of the harmful effects of air pollution were seen, plants and vegetation act as an indicator in this regard.

Some of the most common contaminants :

SO2 ; O3 ; Fluorides ;  HCL; Cl2; NO2

- Effect on materials :

Contaminants can affect materials by particle deposition or abrasion and also by chemical reactions between the contaminant and the material. For example : stone, iron and paintings

- SMOG:

SMOG is known as fog-type pollution that occurs in some cities when the combination of certain factors occurs, depending on weather conditions and certain pollutants.

Some of them are:

Industrial smog

Photochemical smog

This phenomenon (SMOG) occurs when the mixture of nitrogen oxides and volatile hydrocarbons emitted by cars and industries and atmospheric oxygen react with solar radiation and form ozone.

- Acid deposition.

It is a regional effect. It results from the transformation of atmospheric pollutants such as sulfur dioxide (SO2) and nitrogen oxides (NOx) into secondary pollutants such as sulfuric acid (H2SO4), ammonium nitrate (NH4NO3) and nitric acid (HNO3).

Therefore, air pollution caused by SOx and NOx affects water, soil and ecosystems.

- Water contamination

Pollution of the waters of a sick river and kill fish, but not only these, but all forms of aquatic life .

Pesticides and other toxic chemicals that are used in the domestic environment, farms and industrial production, and that are dumped into the water, cause fish death.

3 0
3 years ago
Which component of Earth's atmosphere is responsible for absorbing ultraviolet radiation? A. OZone B. Nitrogen C. Water vapor D.
djyliett [7]
A) the ozone layer, it is the one that takes the uv light from the sun
4 0
3 years ago
Read 2 more answers
If a person adds benzidene to cells grown in a test tube. Within minutes, she see’s the cells energy level fall and the metaboli
mart [117]

Answer:

B. Mitochondria

Explanation:

  • Mitochondria are known as the power house of the cell. They are the sites of cellular respiration that breaks down glucose into energy molecules such as ATP and energy storage molecules such as NADH and FADH2.
  • In this scenario, since the cell's energy levels fall and metabolism ceases, the organelle most likely affected is the mitochondria.
  • If mitochondria are affected, glucose will not be metabolized to ATP and the cell will not have sufficient energy for cellular functions.
3 0
3 years ago
A localized group of organisms belong to the same species is called a population explain how and why
igor_vitrenko [27]
They are called a population, because they are the same species living in a given area. The word population means the amount of a certain species living in a certain environment.

Eek
8 0
3 years ago
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