Answer: (B) Pre-zygotic; post-zygotic.
Explanation:
Prezygotic isolation occurs before fertilization of eggs. It occurs between the two sex gametes and deter sexual reproduction between different species.
However, individuals are considered to be diverge on the phylogeny tree and different species, when they cannot reproduce.
Mechanisms of prezygotic isolation include habitat isolation, gamete isolation, mechanical isolation, behavioral isolation, and mating seasons.
Whereas, postzygotic isolation prevents the formation of fertile offspring. This phenomenon leads to production of an hybrid offspring from different species and this is a form of speciation in nature.
Mechanisms of postzygotic isolation include hybrid inviability, hybrid breakdown, and hybrid sterility.
Which of the following incorrectly matches the term with its location?
A. DNA is found in a chromosome.
B. Chromosomes are found in the nucleus of a cell.
C. Genes are located in a nucleotide.
D. Nitrogen bases are located in the central rungs of a DNA ladder.
ANSWER
C. Genes are located in a nucleotide.
Answer:
1. cell wall, chloroplasts
2. A plant cell is rectangular, while an animal cell is circular. This is because of the cell wall.
3. The function of the chloroplasts is to make sugars and pigments for photosynthesis.
4. The vacuole acts as a storage structure and can hold food for the organism.
Explanation:
Answer:
F) Thermohaline circulation pattern move surface water from equatorial regions to the poles
Active deffusion.. this way the water is retained and the unnecessary salts ions are expelled out.
