Chloroplasts are double membrane bound organelles found in plants. It contains a photosynthetic pigment called chlorophyll which is responsible for the green color of the leaves and sometimes stem. The whole process of photosynthesis takes place in chloroplast. Chloroplast contains thylakoids and stroma (matrix).
Answer: Sugars are formed in the STROMA of chloroplasts.
Answer:
Differential reproduction leads to a change in allele frequencies over time. This occurs because of natural selection favoring "successful" individuals that produce more viable offspring.
The sickle-cell allele is maintained in populations exposed to malaria through balancing selection, since heterozygous individuals have protection against the disease.
Answer:
Empty calories may be grasshoppers' downfall.
Explanation:
Many insect populations are declining, and a provocative new hypothesis suggests one problem is that rising levels of atmospheric carbon dioxide (CO2) are making plants less nutritious. That could spell trouble not just for insects, but for plant eaters of all sizes.
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