You are an aspiring botanist and decide to study some orchid genetics. Knowing that the pink color phenotype is an incompletely dominant phenotype, you decide to study it further. You discover that when you cross two pink orchids, you only ever obtain a phenotypic ratio of 1/3 white orchids to 2/3 pink orchids. How might you explain this phenomenon

Answers

Answer 1
Answer:

You are an aspiring botanist and decide to study some orchid genetics. Knowing that the pink color phenotype is an incompletely dominant phenotype, you decide to study it further. You discover that when you cross two pink orchids, you only ever obtain a phenotypic ratio of 1/3 white orchids to 2/3 pink orchids. How might you explain this phenomenon

A)The dominant color allele produces a lethal phenotype when one copy is present. B)The recessive color allele produces a lethal phenotype when two copies are present. C)The dominant color allele produces a lethal phenotype when two copies are present. D)The recessive color allele produces a lethal phenotype when one copy is present

Answer:

C)The dominant color allele produces a lethal phenotype when two copies are present.

Explanation:

Let's suppose that allele R gives a pink phenotype in the heterozygous condition while the allele r gives white phenotype in the homozygous genotypes. So, the genotype of the pink orchids would be Rr. A cross between two Rr plants obtain progeny in following genotype ratio:

1/4 RR: 1/2 Rr: 1/4 rr

Here, the R allele is lethal in homozygous genotypes and the progeny ratio become=

1/3 white: 2/3 pink


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Which statements describe the characteristics of an individual protein? Select two options. It is specific to one biochemical reaction. It increases the activation energy needed for a reaction. It can catalyze many different reactions. It increases the rate of a biochemical reaction. It slows down the rate of a biochemical reaction.

Answers

The branch of science which deals with chemistry uses in biology is called biochemistry.

The correct option to the question is A and D

The digestion of protein requires the enzyme which catalyzes the reactant and speeds up the reaction by decreasing the activation energy. According to this concept, option B is wrong.

The protein molecule has an active binding site that is specific to each protein. Each protein has a specific type of enzyme that catalyzes the reaction. Hence option C is also wrong.

Hence, the correct option is A and C that is an It is specific to one biochemical reaction and It slow down the rate of a biochemical reaction.

For more information, refer to the link;-

brainly.com/question/25026730

Answer: . It is specific to one biochemical reaction

It increases the rate of a biochemical reaction.

Explanation:

Protein acts as enzymes and are useful in reactions that occurs in the cell as a catalyst.

Enzymes are characterized by speeding up the rate of chemical reactions without destroying themselves or disturbing equilibrium that occurs between the reactant and the product. Individual protein are specific to a particular reaction and are good catalyst of chemical reaction as they help to speed up reactions.

A cell may transport a substance in lysosomes / vesicles if the substance is too large to cross the membrane.

Answers

Answer:

The correct answer would be vesicles.

Vesicles are defined as fluid filled sac or bladder enclosed by lipid bilayer.

Transport vesicles are specialized vesicles used in transportation of material (such as proteins, enzymes, hormones, neurotransmitters etc) within the cell as well as outside the cell.

Proteins required by cell organelles and plasma membrane are usually synthesized by ribosomes at rough endoplasmic reticulum and transported to Golgi bodies with the help of vesicles for further maturation and modifications.

Post-modifications these proteins are transported to their destined organelles (like plasma membrane, peroxisome, outside the cell etc) after packed into the transport vesicles.

The lipid membrane of the transport vesicle merges with the plasma membrane in order to release these proteins outside the cell.

In contrast, lysosomes are the cell organelles which contain digestive enzymes. They help in digesting food particles and unwanted cellular components or cellular debris.

How many grams of carbohydrate per day are recommended for adults 19 years and older? A. 75 grams
B. 100 grams
C. 130 grams
D. 160 grams

Answers

Answer:

correct option is C. 130 grams

Explanation:

solution

as carbohydrate is a macro nutrient that is found in many foods and beverage

Most of carbohydrate occur in plant base food

some main natural source of carbohydrate are

  1. vegetable
  2. fruit
  3. nuts
  4. milk
  5. grain
  6. seeds

and for adult age of 19 years to 30 years carbohydrate need is 130 grams per day

and adult male age of 19 years to 30 years fiber need is 38 grams per day

and adult female age of 19 years to 30 years fiber need is 25 grams per day

so correct option is C. 130 grams

Today, our current understanding of evolution is an elaboration and refinement of Darwinian evolutionary theory, taking into consideration additional evolutionary mechanisms not predicted by Darwin. This unified theory of evolution is known as :

Answers

Answer:

This unified theory of evolution is known as Modern Synthesis

Explanation:

The Modern Synthesis of Evolution reconciles the theory of the evolution by natural selection of Charles Darwin, the genetic theory of heredity of Gregor Mendel, the aleatory mutation as the principal source of genetic variability and population genetics.

La síntesis evolutiva moderna (también llamada simplemente nueva síntesis, síntesis moderna, síntesis evolutiva, teoría sintética, síntesis neodarwinista o neodarwinismo) significa en general la integración de la teoría de la evolución de las especies por la selección natural de Charles Darwin, la teoría genética de Gregor Mendel como base de la herencia genética, la mutación aleatoria como fuente de variación y la genética de poblaciones. Los principales artífices de esta integración fueron Ronald Fisher, J. B. S. Haldane y Sewall Green Wright.

4 substances containing nitrogen or phosphorous that are related to biological processes

Answers

Answer:

DNA, RNA, ATP, and the phospholipids that form all cell membranes

Explanation:

In a 10 m2 ecosystem, there are 60 raccoons. What is the population density of raccoons?

Answers

the answer is 6 raccons per square meter