Five changes associated with aging include
1. There is progressive reduction in physical health due to loss of muscle tissue
2.There is occurrence of vision changes whereby it becomes impaired in older people
3. Skin becomes less elastic and age spots and wrinkles appear on the skin
4. Hearing also becomes impaired
5. length of sleep at night massively decreases.
Answer:
The correct answer is biological.
Explanation:
When any pathogen invades the body, it has to pass several lines of defence. The first barrier is the skin and mucous membrane which is a physical and chemical barrier. The second line of defence is the non-specific response by macrophages, neutrophils and interferon. After crossing these two barriers the third line of defence comes into action in which, the B- cells and T-cells act specifically on the pathogen and destroy it.
Answer:
Lunar Phases.
Explanation:
Lunar phases are created by changing angles of the earth, the moon, and the sun, as the moon orbits the earth.
It is B, as one organism is benefiting, while the other is harmed
Answer:
If they are different, the organism is heterozygous at that locus. If one allele is missing, it is hemizygous, and, if both alleles are missing, it is nullizygous. The DNA sequence of a gene often varies from one individual to another. Those variations are called alleles.
