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svp [43]
4 years ago
9

Why the bass and crayfish benefit from an increased level of phosphate, initially, but then die off

Biology
1 answer:
omeli [17]4 years ago
8 0

Answer:

Increased levels of phosphate are beneficial to phytoplankton and aquatic plants. In the short-run, this means increased micronutrients for herbivorous and omnivorous fish.

The phosphate, however, reacts with the water to reduce the oxygen levels obtainable in the water. Without oxygen, the fishes die off.

It is not unusual to find that with increased phosphate in water, healthy fishes begin to die off without any other plausible explanation.

The solution is to clean the water or treat it with solutions that impact positively whilst reducing the phosphate levels.

Cheers!

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Explain the activity of protease at pH 4.0 and at pH 7.0
ryzh [129]

Answer: The pH dependence is usually due to the side groups of the amino acids. A change in pH changes the protonation pattern and can, in extreme cases, result in protein denaturation. I therefore suspect that your protein stabilizes the enzyme structure, thus keeping it active at sub optimal pH values.

Explanation: Hope this helps :)

5 0
3 years ago
Michael is type o−. he is donating blood today and wants to know what blood types can accept his blood. what would you tell him?
OLEGan [10]
You would tell Michael he can donate to all blood types.
8 0
3 years ago
Answer the questions or write definitions of the first 20
S_A_V [24]

Answer:

1. Hypothesis:

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

2.Ocean systems:

The ocean is a global, interconnected system that has regions, or basins. Water and ocean life move between these basins and up and down the water column. Ocean water circulates around the globe through ocean currents that are either wind-driven currents or density-driven currents.

3.Proteins:

a class of nitrogenous organic compounds which have large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, etc., and as enzymes and antibodies.

4.Saturated fat molecules:

Saturated fat, a fatty acid in which the hydrocarbon molecules have a hydrogen atom on every carbon and thus are fully hydrogenated. (By way of comparison, the hydrocarbon molecules of unsaturated fats have two carbons that share double or triple bonds and are therefore not completely saturated with hydrogen atoms.)

5.Enzymes:

a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

6.Prokaryote:

a microscopic single-celled organism which has neither a distinct nucleus with a membrane nor other specialized organelles, including the bacteria and cyanobacteria.

7.Eukaryote:

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaea.

8.Hemoglobin:

a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group.

9.Active Transport:

the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

10.Phospholipids:

a lipid containing a phosphate group in its molecule, e.g. phosphatidylcholine.

11.Facilitated diffusion:

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

7 0
3 years ago
James is homozygous dominant for curly hair (cc), and his wife is heterozygous (cc). what is the probability that their first ch
daser333 [38]

The representation of the genotypes is as follows:

Homozygous dominant for curly hair (James): CC

Heterozygous dominant for curly hair (wife): Cc

The curly or straight hairs are the phenotypes and CC or Cc is the genotype of parental alleles.

When the first child is born which means the F1 generation, the type of hair the child will have can be predicted by punnet squares. The Punnet squares have been shown in the image.

From the above punnet squares, two out of four probable phenotype or genotype of curly hair is 2/4 = 1/2 or 50%, have CC as their genotype and are homozygous dominant for curly hairs.

4 0
4 years ago
Read 2 more answers
All of the following enhance water transport in terrestrial plants except: a) hydrogen bonds linking water molecules. b) capilla
Nimfa-mama [501]

Answer:

D) K being transported out of the guard cell.

Explanation:

The movement of water in the terrestrial plants is a very important factor as each cell of the plant require water to survive.

The movement of water is influenced by many physical, chemical and process going on in the plants like transpiration and stomatal opening and closing.

Water posses adhesion and cohesion properties which allow the water molecules to form a bond with other surface and with each other respectively. This allows the movement of water in the xylem by a process called capillary action.

The evaporation of water creates a pressure on the plant to absorb water from the soil but when potassium ions move out of the guard cell of stomata, the guard cells lose turgidity and stomata gets closed.

Thus, Option-D is correct.

6 0
3 years ago
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