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Katarina [22]
3 years ago
14

What determines how reactive an atom is

Biology
1 answer:
BARSIC [14]3 years ago
7 0

The number of electrons in the outermost shell of an atom determines its reactivity.

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Why can polyploidy individuals lead to speciation fairly quickly?
nekit [7.7K]

Answer:

In species with polyploid, there are more chromosomal sets than in diploid one. Becouse there are more chromosomal structures available,  events like mutation, recombination, DNA lose, are more probable to occur.

As the generations pass, the accumulation of these changes tend polyploid to speciation.

8 0
3 years ago
After the milk and bacteria ferment, what are the two parts that we separate?
Korolek [52]

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Latic acid and rennet cause the milk to curdle,which SEPARATES the curds.

4 0
3 years ago
Explain how a change in the environment can cause the disappearance of traits or possibly cause an extinction of a species.
aliya0001 [1]

Answer:

Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.

8 0
3 years ago
Jane had leukemia as a child and had to undergo numerous bouts of chemotherapy. The chemotherapy always made her nauseous. As sh
Stels [109]

Answer:

The waiting room became the conditioned stimulus.

Explanation:

Conditioned stimulus is the reflexive behaviors or the learned behavior.

This stimulus may be defined as a neutral stimulus that with some time and some training will evoke a response by continuously being associated with any other natural occurring stimulus.

4 0
3 years ago
In genetics, the dash symbol (-) is a "wild card" that stands for either the dominant allele or the recessive allele; for exampl
m_a_m_a [10]

Answer:

12 : 3 : 1

Explanation:

According to Mendel's principles, a dihybrid cross between two heterozygous summer squash parents (WwGg X WwGg) should yield offsprings, 12 with white, 3 with yellow and  1 with green color phenotype. The classic Mendelian phenotypic ratio for dihybrid cross is 9:3:3:1. In this case, genotypes W- G- and W- gg produce white color phenotype. This is because we have 12: 3: 1 phenotypic ratio in which the alleles of two different genes assort independently into gametes.

<em>Dihybrid cross for heterozygous summer squash:</em>

                    WG         Wg            wG            wg          

    WG      WWGG   WWGg     WwGG     WwGg

    Wg       WWGg   WWgg     WwGg      Wwgg

    wG        WwGG    WwGg     wwGG      wwGg

      wg       WwGg    Wwgg     wwGg        wwgg

   Genotypes:

   W-G-  and W- gg  = white = 12

    ww G- = yellow = 3

     ww gg = green = 1

3 0
3 years ago
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