Answer:
D. Tt with Tt
Explanation:
In the given question, the student wants to study the stem length in the plants which are controlled by the T (dominant) and t (recessive) alleles.
To study the monohybrid cross for the stem length, the student must cross the heterozygous forms of the gene for the trait as it will produce the mixture of variables of height.
cross- Tt x Tt
T t
T TT Tt
t Tt tt
1. Genotype TT - tall height
2. Genotype Tt- tall height
3. Genotype tt- small height
Thus, Option-D is correct answer.
Aristotle based his classification system off of observations of animals, and used physical characteristics to divide animals into two groups
The right answer would be b because as you learn more about it then it will become more clear
Because this tells us that we were not alone and that we may not be alone.
Answer:
- These are water bodies formed from melting glaciers
- However, their size can vary from a few square meters to thousands of square kilometers
- They can be seasonal, existing for a few months or exist for hundreds of years or more
Explanation:
The lakes and the ponds are freshwater bodies of water. They can be formed in numerous different ways, from melting of glaciers, rivers flowing into closed valleys, changes in the geography of a space, increased amounts of precipitation. They can vary in size, and there are ponds and lakes that are very small, just few square meters, or to be thousands of square kilometers in size. Some of the lakes and ponds tend to be seasonal, unlike the majority that are existing throughout the whole year, and the reasons for this are the climate and the manner in which they form. Some lakes can be very old, millions of years of age, like the Ohrid Lake in Macedonia, which is also the most important lake in the world from biogeographical stance of point, and it is considered as one of the most attractive ones in the world as well.