The following five limiting factors would control the
population density of weeds;
<span>1.
</span>Supply and nutrients in the soil
<span>2.
</span>Presence/Absence of growth-restricting
substances such as pesticides
<span>3.
</span>The soil aeration and soil structure
<span>4.
</span>Moisture content in the soil.
<span>5.
</span>Biotic factors such as disease and pests
<span>6.
</span>Quality, intensity and duration of light
Answer:
An index fossil is a fossil used to determine the age of the sediments in which it is found. When quickly approximating the age of new finds, an archaeologist looks at the rocks in which it is buried, as those sediments would have been on the surface at the time of the death of the pre-historic creature.
hope this helps
The ductus arteriousus is a blood vessel that connects the pulmonary artery to the descending aorta. Otherwise known as the ductus Botalli, this structure pumps blood into the fetus' non-functioning lungs from the right ventricle. This blood vessel will close at birth and becomes the ligamentum arteriousum.
The
most important thing to prepare for a storm is knowing
were to go in case you need to evacuate. If the later is not a
possibility then create
and practice a plan of action for you and your family and build and
emergency kit with first-aid supplies, water and nonperishable foods.
After
that
you can focus on identifying the safest place in your house,
establish an emergency communication channel with your family and
reinforce the roof, windows and doors. <span>Secure
the heavy furniture to avoid accidents and move it away from door and
windows and keep tuned to your local radio station to know how to
expect at every time.</span>
