Answer:
D, none of these.
Explanation:
The control group is going to be the radish seeds, they stay the same. The independent variable is the heating lamps and their temperatures. The dependent variable is the seed's growth rates.
Answer:
Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. The goal of every living organism, including plants, is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds.
Many plants have flowers that help them to make seeds in order to reproduce. You can learn ... of flowering plants. One of the major groups of gymnosperm plants is the conifer. ... The hard scales of the cone protect the new seeds as they grow. Seeds ... There are some non-flowering plants that don't produce seeds.
sooo, first one is 3 and the second one is 2
Explanation:
Answer:
A
Explanation:
Doppler Echocardiogram
A traditional echocardiogram uses sound waves to produce images of the heart. In this procedure, a radiologist uses a transducer to transmit and receive ultrasound waves, which are reflected when they reach the edge of two structures with different densities. The image produced by an echocardiogram shows the edges of heart structures, but it cannot measure the speed of blood flowing through the heart. Doppler techniques must be incorporated to provide this additional information. In a Doppler echocardiogram, sound waves of a certain frequency are transmitted into the heart. The sound waves bounce off blood cells moving through the heart and blood vessels. The movement of these cells, either toward or away from the transmitted waves, results in a frequency shift that can be measured. This helps cardiologists determine the speed and direction of blood flow in the heart.