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Scilla [17]
3 years ago
6

When does a girl normally go through puberty?living environment

Biology
2 answers:
MariettaO [177]3 years ago
7 0

Usually, puberty starts between ages 8 and 13 in girls and ages 9 and 15 in boys.

OverLord2011 [107]3 years ago
4 0
Puberty usually starts around 11 years of age, but it may start as early as 6 or 7 years of age. In boys, puberty begins around 12 years as age, but may start as early as 9 years of age. Puberty is a process that goes on for several years. Most girls are physically mature by about 14 years of age. Boys mature at about 15 or 16.
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Identify and briefly describe three (3) of the main contributors to ground water pollution.
Marina CMI [18]

Answer:

Water pollution may be defined as the contamination of the unwanted substance or pollutant with water that changes the normal characteristics of water. Three main contributors of ground water are as follows:

Chemical farming: The use of pesticides and fertilizers in the fields and its direct run off in river and groundwater causes the water pollution.

Industrial waste: The industrial waste consists of harmful chemicals and heavy metals. The direct discharge of chemical waste in the lakes, ground water and ponds makes the water dirty and causes water pollution.

Effluent from waste water treatment plant: The effluent and the harmful chemical waste release from the waste water treatment plant is the major contributor to the ground water. The effluents mix with the ground water and changes the ground water property.

7 0
3 years ago
Blood type has a transmission type called___
anygoal [31]
Answer: blood transfusion

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8 0
2 years ago
During respiration, a seed metabolizes sugars. what is the source of the sugar metabolized by the seed?
pashok25 [27]

The source of the sugar metabolized by the seed is photosynthesis.  

The procedure used by plants to transform light energy into a chemical form of energy is known as photosynthesis. The chemical energy can afterward be discharged to fuel the plants to perform their activities.  

During photosynthesis, carbon dioxide and water can be combined in the existence of chlorophyll and sunlight to generate oxygen and glucose (carbohydrates). However, the prime component generated in the procedure is glucose (sugar) that is the molecule, which generates energy to mediate the activities of the cell.  


8 0
3 years ago
Prokaryotes that obtain their energy from chemical compounds are called _____.
Dvinal [7]

Explanation:

obtain energy from chemotrops. "chemo" means chemical or unnatural therapy..

6 0
4 years ago
When you describe a person as having attached ear lobes, you are describing their genotype.?
Alik [6]
Having attached earlobes is their phenotype. their genotype are the alleles that code for that
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