Well, when chromosomes cross over during prophase 1 of meiosis, the homologous pair of chromosomes exchange segments of DNA which happen to be the genes. So the significance of crossing-over during prophase 1 is that it adds genetic variation to sexually reproducing organisms.
Answer:
1-f; 2-e; 3-a; 4-b; 5-c; 6-d.
Explanation:
Integumentary System - Regulates body temperature, houses cutaneous receptors and synthesizes vitamin D
Nervous System - Responsible for consciousness and memory
Endocrine System - Secretes hormones
Lymphatic System - Transports and filters lymph fluid
Urinary System - Filters and removes waste products from blood
Respiratory System - Responsible for gas exchange between blood and air
Allopactric speciation<span> on </span>island<span> archipelagos. As the organisms move from </span>island<span> to </span>island,<span> rapid </span>speciation is observed because of difference in resource procurement more than just variation in environment. Once these populations adapt to the environment, speciation rapidly occurs.
Answer:
All cells share four common components: (1) a plasma membrane, an outer covering that separates the cell’s interior from its surrounding environment; (2) cytoplasm, consisting of a jelly-like region within the cell in which other cellular components are found; (3) DNA, the genetic material of the cell; and (4) ribosomes, particles that synthesize proteins. However, prokaryotes differ from eukaryotic cells in several ways.
