Slightly fewer than 4 million babies are born in the United States each year, and the details of how, when, and where they arrive are always shifting. Total fertility rate is an estimate of the average number of births a group of women have over their lifetime. The U.S. fertility rate has been declining since 2007.
Answer:
sperm cell contains the x or y
Explanation:
please give brainliest
Answer: the physical changes that occur in the body as sexual development reaches its peak
Explanation:
Puberty refers to the transition of a child into an adult. It is characterized by several physical changes induced mainly by hormones. These changes include:
- deep voice in males; high pitch voice in females
- growth of pubic hairs in males and females
- presence of thicker skin in males; delicate and lighter skin in females
- emergence of breast in females, broad chest in males etc
Answer:
The correct answer would be option D) no gametes.
Explanation:
The ABC model of the flower was formulated to describe the collection of genetic procedures that determines floral organs in several plants. These species consist of four whorls which are sepals, petals, stamens, and carpels. These whorls are expressed by the expression of a number of genes present in each whorl or verticli.
Gene A is solely responsible for the sepals while the co-expression of A and B genes are responsible for the petals. The identity of the stamens is expressed by B and C and the carpels require C and D genes to be active.
The homozygousity for a normal mutation in gene C will lead to inactive or lack stamens and carpels, which are male and female reproductive organs. These are an important structure for forming gametes.
Thus, the correct answer would be option D) no gametes.
Answer:
i think the answer is -7
Explanation:
4 - 46 = -42 -42\6 is -7 i dont know if its right