Answer:
A crevasse is simply a deep crack in a glacier or ice sheet.
Explanation:
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Answer:
A They can possess tissues and organs.
Explanation:
Multicellular are those organisms which are made of more than one cell. All multicellular organisms have tissues and organs. Each organ has a specific function. For example, heart is an organ which is responsible for the pumping of blood throughout the body. Kidney is also an organ which helps in the purification of blood and send waste material such as urine to urinary bladder.
Answer:
Oogenesis in the female is the process that produces fertile eggs, ready for fertilisation by the male sperm. Each egg has only one of each of the 23 human chromosomes - normal body cells have a pair of each, having 46 chromosomes in total.
To produce egg cells, the process of oogenesis takes place in the female ovary. Progenitor cells divide through a cell division process called meoisis, which is also known as a reduction division.
Instead of one cell splitting into two identical cells, four cells are produced which have half the normal number of chromosomes - they are described as being haploid.
The four cells are all genetically different because the process of meiosis involves cross overs of the chromosomes during division, so mixing up the genes inherited from the woman's mother and the woman's father. This variation produces fitter offspring as it widens the genetic variation that is possible.Explanation:
In external respiration carbon dioxide move from capillaries to alveoli, while oxygen move from alveoli to capillaries in internal respiration.
Carbon dioxide is essential to plant life and is a key part of the global carbon cycle. An important component of this cycle takes place when plants take in CO2 and break it down into carbon and oxygen through the process of photosynthesis. The carbon is stored in the plant and the oxygen is released to the atmosphere.