Biology
- Three Domains - Detailed Description
Bacteria (eubacteria) Archaea Eukarya Most bacteria (formerly monerans) Methanogens Protista Thermophiles Fungi Halophiles Animalia Plantae FEATURE ...
- Sex Determination In Animals
Sex chromosomes and AutosomesMost of the diploid organisms are with separate sexes. The organisms producing sperms are called males and those producing eggs (ova) are called females. Chromosome is the major factor to determine the sex of an organism. The...
- Comparison Between Male Cockroach And Female Cockroach (periplaneta Americana)
Male cockroach Female cockroach 1. Larger in size Smaller in size 2. Narrow abdomen Broad abdomen 3. Anal styles present Absent 4. ...
- Comparison Between Lizards And Snakes
Lizards Snakes 1. Slightly compresed body Cylindrical body 2. Two pairs of limbs Limbs are absent 3. Exoskeleton...
- Comparison Between Vertebrates And Invertebrates
Vertebrates Invertebrates 1. Notochord is present in the embryo and vertebral column in the adult Notochord and vertebral column are absent in embryo and adult 2. Gill...
Biology
Comparison between male rat and female rat
| Male rat | Female rat |
| 1. Larger in size | Smaller in size |
| 2. Nipples are degenerate | 6 pairs, fully functional, 3 pairs in thorax and 3 pairs in abdomen |
| 3. Scrotal sacs present | Absent |
| 4. Penis present | Absent |
| 5. Vulva absent | Present |
| 6. Urethral opening at the tip of the penis is common opening for the passage of the sperms and urine | Separate opening in front of vulva |
- Three Domains - Detailed Description
Bacteria (eubacteria) Archaea Eukarya Most bacteria (formerly monerans) Methanogens Protista Thermophiles Fungi Halophiles Animalia Plantae FEATURE ...
- Sex Determination In Animals
Sex chromosomes and AutosomesMost of the diploid organisms are with separate sexes. The organisms producing sperms are called males and those producing eggs (ova) are called females. Chromosome is the major factor to determine the sex of an organism. The...
- Comparison Between Male Cockroach And Female Cockroach (periplaneta Americana)
Male cockroach Female cockroach 1. Larger in size Smaller in size 2. Narrow abdomen Broad abdomen 3. Anal styles present Absent 4. ...
- Comparison Between Lizards And Snakes
Lizards Snakes 1. Slightly compresed body Cylindrical body 2. Two pairs of limbs Limbs are absent 3. Exoskeleton...
- Comparison Between Vertebrates And Invertebrates
Vertebrates Invertebrates 1. Notochord is present in the embryo and vertebral column in the adult Notochord and vertebral column are absent in embryo and adult 2. Gill...