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Sindrei [870]
3 years ago
9

By pairing the ringing of the bell with the presentation of meat, pavlov trained dogs to salivate to the sound of a bell even wh

en no meat was presented. in this experiment, the presentation of the meat was the ____________________
Biology
1 answer:
horsena [70]3 years ago
3 0
It's the stimulus because that's what triggers the salivation which is the reaction
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2. Two organisms would be most closely related if both have the same classification in which of the following groups?
raketka [301]

Answer: D. Species

Explanation:

Species is a group of population in which organisms have many common characteristics and they are capable of interbreeding and producing viable fertile offsprings. The members belonging to the same class and phylum have less common characteristics if they interbreed they may not produce viable fertile offsprings. Also, the organisms of the same kingdom have least common characteristics and will not have viable fertile offsprings after interbreeding.

3 0
3 years ago
Glycolysis results in a net gain of ____ atp molecules.
il63 [147K]

Answer:

As glycolysis proceeds, energy is released, and the energy is used to make four molecules of ATP. As a result, there is a net gain of two ATP molecules during glycolysis.

Explanation:

two atp molecules

5 0
3 years ago
4 The state of matter with a fixed
Brut [27]

Answer:

It's option A- Solid

Explanation:

Solids have definite shape and volume.

3 0
3 years ago
Read 2 more answers
The molecule ATP is composed of elements that are usually found in organic molecules. Which of the following is one of the eleme
pentagon [3]
<span>B) Phosphorus.
ATP is made up of nitrogen, phosphorous, carbon, hydrogen, and oxygen.

Hope this helps :)</span>
8 0
3 years ago
Read 2 more answers
Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). Only homozygous individu
White raven [17]

<span><u>The answer is A. 72.25 percent.</u>

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1</em> and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq </em>are the frequencies of the genotypes.

<span>The <em>r</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>R</em> allele frequency (<em>p</em>), the formula p + q = 1 is used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>R</em> allele (<em>p</em>), it is easy to determine the frequency of the RR genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

4 0
3 years ago
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