The answer is the physical changes that occur in the body as sexual development is stimulated by hormonal changes. The hormonal signals are produced by the brain to the gonads: the ovaries in a girl, the testes in a boy. In response, the gonads produce hormones that stimulate libido and the growth, and the respective physical characteristics associated with either sex.
The phylogenetic tree of organisms within the animal kingdom include characteristics below:
- Ancestral protists
- Tissues
- body symmetry
- Germ layers
- Body cavity
- Porifera
- Platyhelminthes
- Nematoda
- Annelida
- Mollusca
- Arthropoa
- Echinodermata
- Chordata
<h3>What is phylogenetic tree?</h3>
A phylogenetic tree simply refers to a branching diagram or a tree showing the evolutionary relationships among various biological species of both plants and animals based on their similarities and differences; either genetically or physically
Generally, animals; be it vertebrates or invertebrates has the few characteristics below:
- All animals are multicellular organisms
- Animals are also heterotrophic, meaning; they depend on other organisms for food or they obtain their energy by consuming energy-releasing food substances.
- Animals typically reproduce sexually.
- All animals are also made up of cells that do not have cell walls.
In conclusion, the phylogenetic tree of organisms within the animal kingdom include all characteristics mentioned above
Learn more about animal diversity:
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Answer:
Vector changes with geography.
Explanation:
Vectors of disease are changing with the changing in the geographic location because different vectors survives in different environment so due to change in geography, vectors of a disease also change. Vectors refers to organisms that is responsible for carrying infectious bacteria or viruses that causes certain diseases in animals, plants and humans. Different vectors are present in different geography due to different climatic condition that forbit one vector to survive in all environments.
Pros: It is abundant, and can be used without interruption, cleaner than fossil fuel. Cons: Can result in air pollution, takes a lot of energy to produce, can be seasonable and competes with food production. Landfill gas, solid waste energy comes from harnessing the decomposition of organic material.
