Answer:
Two heterozygous parents have a <u>50%</u> chance of contributing one of their alleles to each offspring.
Explanation:
Individuals who are heterozygous for a specific trait have two different alleles in the gene that determines that trait. This characteristic makes their chances of contributing each of their alleles to the offspring 50%.
The alleles of a gene are distributed in the gametes by the process of meiosis, which results in daughter cells with half the genetic charge, so each gamete can only have one copy of the allelic pair of a gene.
On the other hand, if an individual has two equal alleles for a characteristic in a gene, he has a 100% chance of passing that allele on to his descendants.
Water (H2O) is a fundamental molecule for all living systems. The H2O molecules are capable of absorbing, storing, and releasing energy.
- Water molecules are also capable of expanding upon freezing, dissolving and transporting materials.
- Water reduces the viscosity and the melting temperature of both organic and inorganic compounds (e.g., rocks).
- Water's polarity is responsible for most of its properties.
- Water is a polar molecule because it has one oxygen (O) atom with a slightly negative charge and two hydrogen (H) atoms with a slightly positive charge.
- In consequence, H2O can also be dissolved in other polar solvents.
- For example, alcohols and carboxylic acids are compounds soluble in water due to the presence of a polar hydroxy or hydroxyl (-OH) group.
- The most important water properties include polarity, cohesion, adhesion, specific heat, evaporative cooling, and surface tension.
- Cohesion refers to the fact that hydrogen bonding holds H2O molecules linked together, whereas adhesion is because hydrogen bonding also holds water molecules with other molecules.
- The cohesion of H2O molecules is capable of creating surface tension.
- Specific heat refers to the amount of energy (in Joules) needed to raise the temperature of H2O molecules by one degree Celsius.
- Water molecules have high specific heat, thereby enabling evaporative cooling to occur.
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Its the barrier it proctects the cell and makes sure nothing goes in and nothing goes out
Answer:
Explanation:
There are two main types of succession:
Primary succession. begins with bare rock exposed by geologic activity. example sere: rock -> lichen -> moss -> grass -> shrub -> trees -> oak hickory forest.
Secondary succession. begins on soil from which previous community has been removed (by fire, agriculture, etc.)
