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Inessa [10]
3 years ago
11

Artificial selection only produces favorable results

Biology
1 answer:
astra-53 [7]3 years ago
5 0

Non-fluorescent calcein AM is hydrolyzed by intracellular esterases into the green fluorescent dye calcein, which can be used to quantify the number of viable cells.

https://www.creative-bioarray.com/support/calcein-am-cell-viability-assay.htm

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Groundwater _____. A)exists above the earth's surface B)is impossible to pollute C)forms when precipitation seeps into the soil
kirill [66]

Answer: C

Explanation: It isn't impossible to pollute and it is a usable water source AKA wells

8 0
3 years ago
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What does true breeding mean?
Anarel [89]
A true-breeding<span> organism, sometimes also called a purebred, is an organism that always passes down certain phenotypic traits (i.e. physically expressed traits) to its offspring.</span>
6 0
3 years ago
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The minimum amount of energy needed to start a chemical reaction is known as:
nadya68 [22]

Answer:

The correct option is B. Activation energy

Explanation:

The activation energy is usually used to designate the minimum energy necessary for a given chemical reaction to occur, that is, the basic requirement for the reaction to proceed.

For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy. As the molecules approach, their electron clouds are rejected. This requires energy (activation energy) and comes from the heat of the system, that, is, from translational, vibrational energy, etc of each molecule. If the energy is sufficient, the repulsion is overcome and the molecules are close enough for a rearrangement of the bonds of the molecules.

The concept of Activation energy was introduced by Arrhenius in 1889. Arrhenius suggested that molecules must prossess a minimum amount of energy to react. That energy comes from the kinetic energy of the clliding molecules. Kinetic energy serves to cause reactions, but if the molecules move very slowly, the molecules will only bounce when they collide with other molecules and the reaction does not happen. In order for the molecules to react, they must have a total kinetic energy that is equal to or greater than a certain minimum value of energy called activation energy.

6 0
3 years ago
Which of the following statements is true?
julia-pushkina [17]

Answer: Fewer harmful mutations are inherited by sexual reproduction than by asexual reproduction.

Explanation:

A germline mutation is the mutation in the germ cells (of the fully developed sperm and ovum) of the parents. When the affected parents undergoes with the sexual reproduction the mutations are passed from the parents to the offsprings. When either the mutated oocyte or mutated sperm meet to form a zygote the precursor of new life. Thus few mutations are inherited by sexual reproduction than by asexual reproduction.  

8 0
3 years ago
How does water's polarity help it to dissolve so many substances?
nignag [31]

Answer:

When a polar substance is put in water, the positive ends of its molecules are attracted to the negative ends of the water molecules, and vice versa

Explanation:

id if this helped but

3 0
2 years ago
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