Answer:
Approximately 2000 species become extinct on earth each day.
Explanation:
The extinction is defined by no presence of a particular species on anywhere on the earth. It is estimated that there are 150-200 species present in environment gets extinct every day. The every day extinction of species is in the range of 200 to 2000. The high extinction rate can cause severe negative impact on the environment. The process of extinction can cause ecological imbalance.
Answer:
Decrease in cardiac output
Explanation:
Blood pressure may be defined as the pressure exerts by the artery on the walls during the blood flow. The systolic pressure is used for the calculation of the blood pressure.
The blood pressure depends upon the cardiac output, heart beats and rate of the blood flow. The cardiac output is the volume of blood pumped in the body per minute. The decrease in the cardiac output will ultimately results in the decrease in the blood pressure.
Thus, the correct answer is decrease in cardiac output.
Golgi bodies produce, package, and deliver a product in pinched-off vesicles.
Explanation:
When enough proteins have been created a vesicle is pinched off of the membrane. This development of vesicle then moves through the cytoplasm from the endoplasmic reticulum to the Golgi apparatus. ... The contents of the secretory vesicle are released to where they are required within the cell. The Golgi apparatus collects simple molecules and connects them to make molecules that are more complex. It then takes those big molecules, packages them in vesicles, and unless store them for later use.
Answer:
The correct answer is option B, lower than the threshold velocity for sand
Explanation:
Threshold velocity of the soil is the velocity where soil has overcome the gravitational force and the inter particle force and it starts moving. The factors which affect the threshold velocity of soil are –
a) Lower the sand content , higher will be the threshold velocity
b) Size of aggregates in the soil – the larger the size of the aggregate the larger will be its velocity
c) Size of soil particles – soils with soil particle size greater than 1 mm shall move easily.
Considering all the above three factors, it is clear that the threshold velocity of silt is lower than that of sand as the sand content in silt is high and also its particles are finer than that of sand particles.