If the outer energy level of the atom is , it does not react readily with other atoms.
The atom has it's outer energy level FULL, it doesn't need anymore electrons; so it's not going to bond with any atoms. It needs no more valence electrons to fill its outermost shell.
Answer:
To ensure that good and reliable data are collected.
Explanation:
:)
Answer;
Organisms capture energy from the environment.
Explanation;
-Organisms Capture & Store Free Energy for Use in Biological Processes.
Autotrophs capture free energy from physical sources in the environment.
-Photosynthetic organisms capture free energy present in sunlight.
-Chemosynthetic organisms capture free energy from small inorganic molecules present in their environment, and this process can occur in the absence of oxygen.
Heterotrophs capture free energy present in carbon compounds produced by other organisms.
-Heterotrophs may metabolize carbohydrates, lipids, and proteins by hydrolysis as sources of free energy.
-Fermentation produces organic molecules, including alcohol and lactic acid, and occurs in the absence of oxygen.
Answer:
D) males are hemizygous for the X chromosome
Explanation:
Both males and females have two sex chromosomes, but females have two X chromosomes and males have one X chromosome and one Y chromosome. When only one copy of a gene is present in the cell of a diploid individual, that gene is in hemizygous condition.
- A female can be heterozygous for a sex-linked trait, one X chromosome carrying a dominant allele and the other X chromosome carrying the recessive allele. In that case, the expression of recessive allele will be masked by the expression of the dominant allele.
- Males, however, only have one X chromosome, so any allele it carries will be expressed, regardless of its dominance. For that reason, the frequency of appearance of sex-linked traits will be higher in males than in females.
The features that are common to all cells include;
- Cytoplasm
- Ribosomes
- Genetic material
- Plasma membrane
<h2>Further Explanation;</h2><h3>Cell </h3>
- A cell is the basic unit of living organisms. It is the fundamental unit of all living organisms. All tissues in living organisms are made of cells.
- There are two types of cells; prokaryotic cells and eukaryotic cells.
<h3>Prokaryotic cells </h3>
- These are cells found in prokaryotic organisms such as bacteria. These cells are characterized by having;
- No nucleus
- DNA or nuclear material in an unbound region called the nucleoid
- No membrane-bound organelles
- Cytoplasm bound by the plasma membrane
<h3>Eukaryotic cells </h3>
- These are types of cells that are found in higher organisms such as plants and animals.
- Eukaryotic cells are characterized by having;
- Cytoplasm
- Membrane-bound organelles such as golgi bodies, mitochondrion, etc
- DNA in a nucleus that is bound by a nuclear membrane.
<h3>Similarities between prokaryotic and eukaryotic cells </h3>
All cells share similar features which include;
- Presence of a plasma membrane
- A cytoplasm that is bound by a plasma membrane
- Genetic material, that is, chromosomes containing genes
- Ribosomes that are responsible for making proteins
Keywords: cells, prokaryotic cells, eukaryotic cells
<h3>Learn more about:</h3>
Level: High school
Subject: Biology
Topic: Cell
Sub-topic: Types of cells
