Answer:
D
Explanation:
Competition occurs between organisms living in the same habitat, rely on the same resources for survival and the resource is in short supply.
So, from the given options competition will occur in rabbit habitat that have short supply of vegetation due to due to a drought. Now rabbit will compete with each other for limited food supply for their survival.
Hence, the correct answer is "D."
Answer:
The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers.
Answer:
The control group consists of elements that present exactly the same characteristics of the experimental group, except for the variable applied to the latter. This group of scientific control enables the experimental study of one variable at a time, and it is an essential part of the scientific method.
TRANSPORT IN PLANTS?
What about transport in plants, how does
a Redwood, one of the tallest trees in the world, move water from the
soil to the needles on its tallest branches over 300 ft in the air?
(That’s over 30 stories high!) Or how does a carrot transport the
sugars made in its green, leafy tops below the surface of the soil to
grow a sweet, orange taproot? Well, certain types of plants (vascular plants)
have a system for transporting water, minerals, and nutrients (food!)
throughout their bodies; it’s called the vascular system. Think of it as
the plant’s plumbing, which is made up of cells that are stacked on top
of one another to form long tubes from the tip of the root to the top
of the plant. To learn more about it, let’s study the stem.
Answer: B) The two students who have two fragments have one restriction site in this region.
Explanation: Gel electrophoresis is a technique used to separate DNA fragments by size and charge. Electrophoresis consists in applying a current through a gel that contains the molecules of interest. Based on their size and load, the molecules will travel through the gel in different directions or at different speeds, thereby separating each other. All DNA molecules have the same amount of charge per mass. Because of this, gel electrophoresis separates DNA fragments only by their size.
Electrophoresis allows us to see how many different DNA fragments are present in a sample and how large they are with respect to each other. We can also determine the absolute size of a DNA fragment by examining it next to a standard "scale" of fragments of known size.
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