The reason for the loss of color after the industrial revolution is that the light-colored moths were "selected against" by predators. These birds could only see the light ones against the newly dark, sooted background. Over time, these predators could no longer distinguish the dark ones from their natural dark, sooted background. Thus more light-colored moths stood out against the dark soot, and were eaten. And more dark-colored moths eluded the birds, survived to reproduce, passing on more of their dominant genes for dark color to their offspring. After several decades of hundreds of thousands of generations, most of the later generations were dark, due to selective advantage of camouflage to survive predation.
Answer:
In order for pregnancy to happen, sperm needs to meet up with an egg.
Answer: nitrogen
, CALCIUM
, nitrogen
, Carbon-14
, Mercury
, Boron
Explanation:
A. nitrogen
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of nitrogen-15? Socratic.
B. CALCIUM
CALCIUM - I have 20 neutrons and am found in your teeth and bones
C. nitrogen
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of nitrogen-15? Socratic.
D. Carbon-14
Carbon-14 atoms have two extra neutrons, giving them a total of 8 neutrons. Carbon-14 has an atomic mass of 14 ( = 6 protons + 8 neutrons).
E. Mercury
Mercury is a chemical element with symbol Hg and atomic number 80.
F. Boron group element, any of the six chemical elements constituting Group 13 (IIIa) of the periodic table. The elements are boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), and nihonium (Nh).
• The kingdom PROTISTA includes autotrophic and heterotrophic, unicellular and multicellular organisms.
• The most specific taxonomic level is SPECIES
• The characteristic of all living things is PRODUCE OFFSPRING BY MEANS OF SEXUAL REPRODUCTION
• In 1990 —> SOME ORGANISMS WHICH WERE PREVIOUSLY CHARACTERIZED TOGETHER WERE DETERMINED TO BE GENETICALLY VERY DIFFERENT
• a virus is not living because it does not have —> GENETIC MATERIAL
• An amoeba, oak tree, squirrel, and mildew are classified in the same —> DOMAIN
* for the rest of the questions, im assuming there’s a picture, could you provide one?*
From the diagram above, I dont think that organisms of the same order share a stronger evolutionary relationship than organisms in the same phylum. This is because, after kingdoms, the subsequent categories of increasing specificity are: phylum, class, order, family, genus, and species.
<h3>Levels in taxonomic classification</h3>
At each sublevel in the taxonomic classification system, organisms become more similar.
Organisms that share similar physical features and genetic sequences tend to be more closely related than those that do not.
Scientists use a tool called a phylogenetic tree to show the evolutionary pathways and connections among living organisms.
<h3>Phylogenetic tree</h3>
A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms
<h3>
Taxonomical classification</h3>
Taxonomy is the scientific study of naming, defining and classifying groups of living organisms based on shared characteristics. There are seven main taxonomic ranks:
- kingdom
- phylum ( in animals )or division ( in plants )
- class
- order
- family
- genus
- species.
Learn more about taxonomy:
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