Answer:
chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of oligonucleotide acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.
Explanation:
3 examples are-
1.ice wedging - when water gets into cracks, freezes and expands
2.roots-while they grow, they push rocks aside that later break.
3.animals- when they dig underground, they push rocks aside causing them to break
A. polar bond
d hydrogen bonding
c capillary action
Answer:
9:3:3:1.
Explanation:
The offspring produced with the ratio of 9:3:3:1 in this crossing. In the F1 generation, all the organisms have the dominant allele but when the two F1 organisms are allowed to mate with each other, the highest ratio of offspring i. e. 9 having dominant allele is produced, hybrid organisms are also produced in the ratio 3 and in the last the offspring that have recessive allele is produced having the ratio of 1.
The rib cage is known for enclosing and protecting the thoracic cavity. In the thoracic cavity, the heart and lungs are present. Hence, the rib cage protects the heart.