The first can be filled with an element and the second blank can be filled with a compound.
Iron is an element as it contains only one kind of atom, which combines with the oxygen from the air to produce rust, that is, iron oxide. The rust comprises two kinds of atoms, which signifies that it is a compound. A compound refers to a molecule that comprises at least two types of atoms. In the case, iron oxide is a compound as it comprises Fe and O atom.
Answer: Option B
Explanation:
A non native species is greatest threat to biodiversity. The species that are not present in the particular place and are introduced in the biodiversity by any means whether it is intentional or unintentional is known as invasive species or non native species.
The non native species of bees is introduced to prey on the fire ants can be a threat to biodiversity as it can use the resources available for the native species.
The effect of the non native species on the native species is not predictable on the species that is already present there.
Answer:
Flocking (birds) and cooperative hunting (lions or wolves)
Explanation:
In large animal groups, social behavior enables to obtain an evolutionary advantage over non-social species by making decisions that are likely to be beneficial for the group. In humans, a comprehensive understanding of these benefits has shown to be useful in different areas ranging from social to economic systems.
Cooperative Hunting is a social behavior that enables predatory social species like lions to hunt larger organisms, thereby improving the adaptive fitness of individuals.
Bird flocking is another type of social behavior in which a group of bird is in flight. This behavior is shared by very different species such as insects and fish. Flocking has shown to be beneficial to individual birds to take care of predators and to find food.
Answer:
The skeletal system is the body system composed of bones and cartilage and performs the ... Without the skeletal system, you would be a limp mass of organs, muscle, and skin. ... enough to slip under the shoulder blade (scapula) forcing it up as a hump. ... store phosphate; store calcium; make blood cells; move like levers.
ANSWER
BONES AND CARTILAGE
<span>The first electrochemical cell was invented by Alessandro Volta.
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