The upper forelimbs of humans and bats have fairly similar skeletal structures. T/F

What is the maximum number of hours that food can be held in the food danger zone?

Agata [3.3K]

To answer this question, let us first mention what is food danger zone. Well, this refers to the temperature range in which bacteria grows faster in the food. The range is defined as 30 to 140 degree Fahrenheit or can be converted into 4 to 60 degree Celsius. Going back to the question, the maximum number of hours that a food can be held in the food danger zone is only 2 hours. Beyond this 2 hours, the food is not safe to be eaten and the person who dares to eat this food might get some illness and worst might experienced food poisoning.

7 0

3 years ago

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Why do cells need to be able to transport things across their membranes

Annette [7]

Answer:

Cell membranes are selectively permeable which means it allow certain molecules to move across it into and out of the cell. Cells need to be able to transport these substances to live and grow.

Transport of ions, water maintains the osmotic pressure of the cell. Transport of sugars like glucose is necessary to generate energy for the metabolic activities of the cell. Gases like CO2 are waste products of metabolic reaction which are removed by the cell through the cell membrane. Amino acids are required to make proteins.

Transport across cell can occur through active and passive transport and transport of these substance are necessary for a cell to live and function properly.

6 0

3 years ago

Cellular respiration map

nexus9112 [7]

Explanation:

Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate (through the process of glycolysis in the cytoplasm).

overall: C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

Further Explanation:

In all eukaryotic cells, mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced.

Oxidative phosphorylation follows; this is a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD. Electrons continue to move down the chain the energy they release is used in pumping protons out of the matrix of the mitochondria.

This forms a gradient where there is a differential in the number of protons on either side of the membrane the protons flow or re-enter the matrix through the enzyme ATP synthase, which makes the energy storage molecules of ATP from the reduction of ADP. At the end of the electron transport, three molecules of oxygen accept electrons and protons to form molecules of water...

Glycolysis: occurs in the cytoplasm. 2 molecules of ATP are used to cleave glucose into 2 pyruvates, 4 ATP and 2 electron carrying NADH molecules. (2 ATP are utilized for a net ATP of 2)

The Citric acid or Kreb's cycle: in the mitochondrial matrix- 6 molecules of CO2 are produced by combining oxygen and the carbon within pyruvate, 2 ATP oxygen molecules, 8 NADH and 2 FADH2.
The electron transport chain, ETC: in the inner mitochondrial membrane, 34 ATP, electrons combine with H+ split from 10 NADH, 4 FADH2, renewing the number of electron acceptors and 3 oxygen; this forms 6 H2O, 10 NAD+, 4 FAD.

Learn more about cellular life at brainly.com/question/11259903

Learn more about cellular respiration at brainly.com/question/11203046

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7 0

3 years ago

Explain how natural selection in snakes might have led to<br>adaptations such as sharp fangs.

DerKrebs [107]

What possibly aided in the adaptation of snakes would be not being able to get food or not being able to Undergo difficult tasks of protecting itself.

5 0

3 years ago

2. Why should credit at reasonable rates be available for all?

AnnZ [28]

Answer:

It helps peoples to pay their credit without facing any difficulties and problems. it makes easier for all.

5 0

2 years ago