Answer: The statement is true.
Overgrazing happens when the animals or livestock feed on pasture when there is no vegetation present. Overgrazing has devastating impact on the environment as drought can strike any time and lack of precipitation means that farming in that area will also be impacted. The amount of rain received is not under the control of farmers and when the drought conditions extend the replenishment of pasture will not happen. Lack of precipitation will cause the plants to die and eventually the livestock feeds on the available plants to survive.
Plants, trees or crops help in increasing the amount of rainfall by the process of transpiration which is a process in which plants loose water as vapours during the photosynthesis. This water released by the plants increases the moisture content of air making the air saturated and brings about rainfall.
Answer:
Nucleus : DNA that synthesizes mRNA
Ribosomes : Amino Acid Binding
Endoplasmic Reticulum : Modelling and Storage
Golgi Bodies : Storage and Dispatch
Answer:
The student's claim is wrong
Explanation:
Grasshoppers like most insects, have an open circulatory system.
A closed circulatory system is that type of circulatory system that can be seen in mammals, reptiles, birds and other higher organisms. it involves the movement of bodily fluid throughout the body through the use of vessels.
A grasshopper has an open circulatory system because its "blood" is not pumped in vessels, but rather, fills all the cavities of its body. this is usually common for less complex animals with low metabolism rates
Answer:
Explanation:
With much lower gravity and much less air resistance, the golf ball will stay airborne longer and travel farther.
Answer:
This question lacks options, the options are:
A) Saliva converting the starch molecules in crackers into simple sugars
B) Digestive enzymes breaking down proteins into smaller fragments
C) bacteria converting lactose into simple sugars in the intestines
D) teeth grinding an almond into smaller pieces in the mouth
The answer is D
Explanation:
A physical change is a change that occurs to a substance without altering its chemical composition. A physical change involved a change in the substance's shape, texture, color, state etc. but not the chemical content of such substances.
In this question involving the processes that occur in digestion, a typical example of physical change is "teeth grinding an almond into smaller pieces in the mouth" because the teeth only changes the shape and texture of the almond. It does not affect the chemical composition of the almond fruit. This is also called mechanical digestion.
Note that, other options involving digestive enzymes breakdown are chemical changes because the enzymes breakdown the chemical components of each substance.
