Which of the following are signs that a boy is going through puberty? a. growth of facial hair and longer finger nails b. voice gets deeper and growth of facial hair c. voice gets deeper and hair color changes d. shoulders broaden and skin darkens

B. voice gets deeper and growth of facial hair

Puberty can be defined as physiological, morphological and anatomical changes that occur in a human body. It is a stage of growth which forms transition between childhood and adulthood. It starts in the age of 8- 12 years. It is caused by the release of the androgen, and testosterone hormones which brings changes. The changes like deepening of voice and growth of the facial hair are the examples of signs that develop in boys during puberty.

chordata is the answer

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).