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nlexa [21]
3 years ago
12

There is someone to help me, I do not understand anything at all!!!

Biology
1 answer:
defon3 years ago
4 0

Answer:

Look below

Explanation:

Graph 1 does indeed show a sudden drop in fermentation (after the evolution of the first living cells). This change occurred because the evolution of the first living cells allowed them to perform a type of respiration unseen before -- aerobic respiration and non-fermentation forms of anaerobic respiration. In other words, they had a new way of making ATP/energy: steps like the Krebs cycle and oxidative phosphorylation. This change occurred because the amount of oxygen was increasing in the atmosphere, and organisms needed to find a way to adapt. It may relate to the increasing temperature because glycolysis doesn't release carbon dioxide whereas this new form of energy production did. If you have more gases in your atmosphere, you're going to see higher temperatures and global warming.

Graph 2: Label B represents the gas carbon dioxide. Label A showed the gases hydrogen sulfide and methane decreasing. This is because photosynthesis would take out such gases from the atmosphere. Label B shows the level of a gas increasing. It's carbon dioxide because photosynthetic organisms released a lotta oxygen which was toxic for most of them, and cellular respiration organisms evolved and in turn increased CO2 levels.

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What is rigor mortis and what causes it?
Usimov [2.4K]

Answer and Explanation:

A couple of hours after the death of an individual or creature, the joints of the body solidify and become secured. This solidifying is called rigor mortis.  

Contingent upon body temperature and different conditions, rigor mortis endures roughly 72 hours.

The partial contraction of the skeletal muscles leads to the occurrence of this phenomena.

4 0
3 years ago
Read 2 more answers
What are the 3 most common shapes of bacteria
icang [17]

Answer:

Individual bacteria can assume one of three basic shapes: spherical (coccus), rodlike (bacillus), or curved (vibrio, spirillum, or spirochete).

Explanation:

4 0
3 years ago
1. In addition to mechanical and chemical digestion of food, the stomach's other major function is: carbohydrate and nucleic aci
Alenkasestr [34]

Answer: Food storage

Explanation:

Stomach is a small pouch like structure which has the ability to store food temporarily.The storage of the food temporarily takes place in the stomach. The food that we eat reaches to the stomach by the help of food pipe.

Here, the food is stored until it is completely broken down into simpler form and enzymes act on them.

The food is then absorbed in the small intestine. But before this food is temporarily stored in the stomach where all the digestive juices and enzymes come to act on the food.

6 0
3 years ago
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3. Large molecules and wastes move<br> through the membrane through
madreJ [45]

Answer: Large molecules and wastes move through the membrane through forms of active transport- endocytosis and exocytosis.

Explanation:

Molecules are moved across the cell membrane via different mechanisms like diffusion, facilitated diffusion and passive transport; however, some very large molecules require specialized types of active transport to cross over- these are endocytosis and exocytosis.

During endocytosis large molecules cells and cell fragments moved across the plasma membrane through a process of <em>invagination;</em> piece of the external cell membrane falls into itself and forms a small pocket that surrounds the target molecule this breaks off from the membrane to form an intracellular vesicle. Different methods of endocytosis such as <em>phagocytosis, pinocytosis </em>and receptor-mediated <em>endocytosis</em>, take in cells,  water and targeted substances respectively.

Like endocytosis, the particles (signal proteins, neurotransmitters and waste material) are surrounded by a phospholipid membrane. However, in exocytosis, this membrane is formed in the cytoplasm, and merges with the plasma membrane’s interior in a process <em>opposite to </em>endocytosis; material is removed from the cell and exported into the cell’s exterior called the extracellular space.

6 0
3 years ago
Which of the following phenotypic classes reflect offspring that were generated as a result of a recombination event?
babymother [125]

Answer:

The correct options are: A " vestigial wings, red eyes" and D "full wings, purple eyes"

Explanation:

female parent: vg+pr+/vg pr

(phenotype - full winged and red eyes)

male parent:  vgpr/vgpr

(phenotype - vestigial winged and purple eyes)

Of these traits, vestigial wings and purple eyes are recessive traits. Hence, when a recombination event occurs, the offspring can potentially have a wild type trait paired with a recessive trait.

6 0
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