Answer:
- Dry climates do not have sufficient <u>moisture</u> during most of the year.
- Deserts are located in the <u>arid</u> climate.
- The <u>temperate</u> climate is in a grassland, or steppe, region.
Explanation:
Desert climate develop when the rate of evaporation is extremely higher than the rate of precipitation. This means that the moisture content would be very low in most of the times of the year. Hence, in the long run, the climate will become semi-arid to arid.
On the other hand, temperate climates reflects the conditons of moderate rainfall that spreads across the year or most time of the year. Usually, temperate climate has sporadic drought, mild to warm summers and cool to cold winters. These conditions are enough supporting to produce grasslands, or steppe.
Plants used in first-generation crosses were called P, or parental generation, plants.Mendel collected the seeds produced by the P plants that resulted from each cross and grew them the following season. These offspring were called the F1, or the first filial (filial = daughter or son), generation.
Operons are gene regulatory mechanisms that involve promoting and repressing genes that are involved in the metabolism of organic substances (i.e. sugars). Living organisms have the innate ability to metabolize glucose as the main source of energy. Although, in the absence of glucose, the organism must "learn" to use sugars other than glucose (such as lactose) in order to survive.
For instance, in the <em>lac </em>operon:
In the absence of glucose, various regulatory proteins promote the transcription of the gene related to the metabolism of lactose. This will ultimately lead to the production of the enzyme beta lactosidase which will enable the organism to use lactose as energy in the absence of glucose. This will therefore increase the chances of the organism for survival and will be naturally selected for evolution.
the answer is B. They travel through pollen tubes
