Answer:
Gravity
Explanation:
When its altitude is matched by the pull of the Earth's gravity, a satellite circles Earth. The satellite will fly off into orbit in a straight line or crash down to Earth without this equilibrium.
By juggling two things, a satellite retains its orbit: its velocity (the speed it takes to travel along a straight line) and the gravitational force on it that the Planet provides. To resist the greater gravitational force, a spacecraft orbiting closer to the Earth needs more velocity.
Answer:
How has the study of ancient primates and human ancestors changed over time, with respect to phylogeny and reconstruction of ancient habitats?
Explanation:
The cerebellum
The cerebellum is a structure that is part of the brainstem and is involved in maintaining balance and motor coordination. This is one of the first structures of the brain to be impacted by alcohol.
The cerebellum is a structure situated behind the upper part of the brain stem. The cerebellum is a small section of the brain and it is composed of two hemispheres. The cerebellum performs several functions such as maintaining balance, coordinating movement, vision (eye movements) and motor learning. The cerebellum also plays important roles in thinking and mood.
Answer:
Meiosis is the process of development of gamates in sexually reproducing organisms. Both males and females use meiosis to produce their gametes. In females the process of meiosis is called oogenesis as it produces oocytes which further develops into ova (eggs) and in males spermatogenesis takes place to produce sperms. Meiosis takes place in the germ cells of the organism. Meiosis is also known as reduction division as a diploid cell reduce to develop 4 haploid daughter cells. Prophase I is the initial phase of meiosis. This phase has six substages, therefore it requires more time to complete especially in oogenesis. During prophase I homologous chromosomes pair exchange their DNA this process results in chromosomal crossover. The new combination of DNA in the cross over chromosomes will be a source for genetic variations with production of new combination of allele. In metaphase I homologous pair of chromosome move together along a metaphase plate , microtubules emerge from the spindle and attach at the kinetochores near the centromere of each chromosomes. Microtubule from one side of the spindle attach to one of the chromosome in the homologous pair and that of other side attaches with other chromosome of each pair. Because of microtubules chromosome pair align at the metaphase plate (equator of the cell). The random alignment of chromosome pair at the equator plate will result in different proportion of transfer of genes from maternal and paternal chromosomes. This is the law of independent assortment, hence this will result in genetic diversity in the daughter cells.
Answer:
The purpose of ethical standards for the treatment of experimental subjects is to assure the safety and well-being of all living things included in the study. Human rights, animal welfare, legal compliance, conflicts of interest, and health standards are all topics covered by ethical guidelines.
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