Crocodiles and alligators are both reptiles from the same order of animals, named Crocodylia. There are however a number of important differences which set these apex predators apart *Crocodiles have a longer, more V-shaped head then alligators.
*The fourth tooth of a crocodile sticks out when its mouth is closed.
*Crocodiles are better adapted to living in seawater.
*Crocodiles are more aggressive than alligators.
*Crocodiles tend to have a lighter appearance than alligators.
*Crocodiles in the wild are found all over the world while alligators are only found in the US and China.
Answer:
Primary lymphoid organs: the bone marrow and the thymus
secondary lymphoid organs: adenoids tonsils spleen
Answer:
In lions, digestion takes place in the stomach while in elephant, digestion takes place in cecum.
Explanation:
Lion eats meat which needs a powerful digestion of strong juices which helps in the breakdown of food. There are four compartments of the stomach of lion that are rumen, reticulum, omasum, and abomasum. These chambers have microorganisms which helps in the breakdown of food materials while in the elephant, the stomach primarily functions in the storage of food and digestion takes place in the cecum that is connected to the large intestine.
<h2>D) is the correct option </h2>
Explanation:
- Conservation tillage conserves soil by reducing erosion
- In the Midwest, erosion by water is the primary concern, whereas western regions of the country are more susceptible to wind erosion
- Soil erosion removes the productive layer of topsoil, reducing crop yields and land value
- Soil removed from fields eventually ends up as sediment in streams, rivers, or lakes
- Sediment collects in surface waters, reducing their water-holding capacity and some crop nutrients and pesticides attach to soil particles and are carried and deposited in waterways along with the soil
- Conventional tillage, such as moldboard plowing, leaves the soil surface bare and loosens soil particles, making them susceptible to the erosive forces of wind and water
- Conservation tillage practices reduce erosion by protecting the soil surface and allowing water to infiltrate instead of running off
