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3 years ago

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Biology

1 answer:

almond37 [142]3 years ago

3 0

Laws:
*Based on facts
*have been proven to be true
*more descriptive
*have evidence & results to show proof

Theories:
*are based on observations
*testable observations that have not been proven
*have evidence to support the claim
*explanation
_
Both:

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A pea plant is tall. It has one dominant and one recessive trait. What is the phenotype and genotype?

Fantom [35]

Answer: The genotype of the pea plant is Tt. T is the dorminant allele and t is recessive.

Tall is the phenotype.

Explanation:

Genotype is a genes of an individual which show the phenotype or the traits.

From the above question, the pea plant have genes of T tall and t for dwarf,because T is dorminant , it is expressed over recessive.

The genotype of the pea plant is Tt.

Phenotype is the observable or visible characteristics the organism posses which is as a result of the genotype been expressed.

The phenotype is Tall.

3 0

3 years ago

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According to the signal detection theory, the detection of stimuli involves decision and sensory processes.

LenKa [72]

Answer:

True!

Explanation:

This work is soo easy for me , It is True my teacher just checked all my answers were correct :) I hope you get a good grade.

3 0

2 years ago

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Escribe lo que piensa de la siguiente suposición si es cierta o no: " Todas las semillas de una fruta sobrevivirán, se convertir

MissTica

Answer:

Esta suposición no es realista, muchas de las semillas no llegarán a la etapa adulta y por lo tanto no podrán generar nueva progenie

Explanation:

Acorde a la teoría de la evolución por selección natural planteada por Darwin, solamente aquellos organismos que se encuentren mejor adaptados al ambiente en el que viven podrán sobrevivir y de este modo perpetuar sus genes en la progenie. Este es un principio que aplica a todos los tipos de organismos vivientes (es decir, plantas, animales, bacterias, etc). Darwin definió a este proceso evolutivo como 'descendencia con modificación', donde aquellos organismos que se encuentren mejor adaptados a su ambiente transmitirán sus rasgos a la descendencia, mientras que aquellos que no se encuentren suficientemente adaptados no podrán sobrevivir.

7 0

3 years ago

Identify an example organism for each type of cellular respiration: aerobic respiration, anaerobic respiration, and fermentation

Julli [10]

Answer:

Anaerobic respiration-" The process by which cells that do not breathe oxygen liberate energy from fuel to power their life functions."

These organisms also use an electron transport chain to generate as much ATP as possible from their fuel, but their electron transport chains extract less energy than those of aerobic respiration because their electron acceptors are weaker. The Staphylococcus aureus and Lactococcus lactis are two organism which performs anaerobic respiration.

Aerobic respiration-"The process by which oxygen-breathing creatures turn fuel, such as fats and sugars, into energy."

Organisms who performs aerobic respiration:

Most of the living beings humans etc.

Fermentation:"The metabolic process by which organic molecules (normally glucose) are converted into acids, gases, or alcohol in the absence of oxygen or any electron transport chain."

Mechanism-" The main porpuse is to convert NADH back into the coenzyme NAD⁺ so that it can be used again for glycolysis."

During fermentation, an organic electron acceptor reacts with NADH to form NAD⁺, generating products such as carbon dioxide and ethanol or lactate in the process.

Types-

Ethanol fermentation,
Lactic acid fermentation.

Explanation:

Difference between Aerobic and anaerobic respiration:

In anaerobic cells, however, respiration typically takes place in the cell’s cytoplasm, since most anaerobic cells do not have specialized organelles.
In aerobic cells, the electron transport chain, and most of the chemical reactions of respiration, occur in the mitochondria.

Steps of Aerobic Respiration:

1. Glycolysis. In aerobic cells, the equation for glycolysis is:

Glucose + 2 HPO₄²⁻- + 2 ADP³⁻ + 2 NAD⁺ → 2 Pyruvate⁻ + 2 ATP⁴⁻-+ 2 NADH + 2 H⁺ + 2 H₂O,

2. Oxidative decarboxylation of pyruvate

2 (Pyruvate⁻ + Coenzyme A + NAD⁺ → Acetyl CoA + CO₂ + NADH),

3. Citric acid cycle

2 (Acetyl CoA + 3 NAD⁺ + FAD + GDP³⁻ + HPO₄²⁻ + 2H₂O → 2 CO₂ + 3 NADH + FADH₂ + GTP⁴⁻ + 2H⁺ + Coenzyme A),

4. Oxidative phosphorylation

34 (ADP³⁻ + HPO₄²⁻ + NADH + 1/2 O₂ + 2H+ → ATP⁴⁻ + NAD⁺ + 2 H₂O)

Electron Transport Chain Steps- These four complexes actively transfer electrons from an organic metabolite, such as glucose. When the metabolite breaks down, two electrons and a hydrogen ion are released and then picked up by the co-enzyme NAD+ to become NADH, releasing a hydrogen ion into the cytosol.

Complex I: The complex-structured proteins embedded in the phospho-lipid membrane.
Continuing onto Complex II,
Traversed to Complex III,
Cytochrome c via co-enzyme Q,
And then finally to Complex IV.

Note-By-products from other cycles and processes, like the citric acid cycle, amino acid oxidation, and fatty acid oxidation, are used in the electron transport chain. As seen in the overall redox reaction,

2 H+ + 2 e+ + ½ O₂ → H₂O + energy

6 0

3 years ago

Identify and describe 3 aspects of what makes sponges valuable: a) ecologically and b) commercially.

Hunter-Best [27]

Ecological Benefits of Sponge:
Provide food source
Provide shelter/habitat
Provide structural strength to reefsMIneralization of nitrogen and carbon and nutrient recycling

Commercial Benefits of Sponge:
A great source of skin care product that is hypoallergenic and great for sensitive skin
Great cleanser foams
Sea sponge agriculture gives livelihood to people

3 0

3 years ago