all the organisms that interact in a lake
B.
all the gray squirrels that live in a forest
C.
an area characterized by a group of plants and animals
D.
a nonliving factor in an organism’s environment
Answer:
B.all the gray squirrels that live in a forest
Explanation:
took the test
Answer:
Nitrogen like other elements is cycling between air and soil in different forms.
Explanation:
When Nitrogen is in the air, there are some specialized bacteria (Nitrogen fixing bacteria) which are capable of transform gas Nitrogen in "solid" Nitrogen that can be asimilated by plants, these bacteria are asociated with plants and live in symbiosis in their roots. Nitrifying bacteria can also transform the Nitrogen in the air and fix it into the soil and denitrifying bacteria can transform soil Nitrogen ,in atmospheric Nitrogen which is present in the air to keep the Nitrogen cycle.
In ecosystems, producers such as plants or phytoplankton make up the base of the food chain. Consumers that eat producers are called primary consumers, and consumers that eat primary consumers are called secondary consumers. Organisms at the top of the food chain are apex consumers.
In many ecosystems, the base, or foundation, of the food chain consists of photosynthetic organisms (plants or phytoplankton), which are called producers. The organisms that consume the producers are herbivores: the primary consumers. Secondary consumers are usually carnivores that eat the primary consumers. Tertiary consumers are carnivores that eat other carnivores. The organisms at the top of the food chain are called apex consumers.
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Cell organelles are capable of reproducing themselves.
B.
Cells differ in shape, but they have identical components.
C.
All cells begin life as prokaryotic cells.
D.
All living things are made up of cells.
Answer:
D.) All living things are made up of cells.
Explanation:
As the cell theory states, all living things are made up of cells, and those cells are divided into to main categories, being plant and animal cells.
B. shared; atoms
C. transferred; ions
D. transferred; atoms
Option B is correct.
B. shared; atoms
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Answer:
B. shared; atoms
Explanation:
Covalent bond is formed by sharing of electrons between two atoms. In this way full outer shell is achieved by both the atoms. Since there is no gain or loss of electrons, no ions are formed in the process.
It is usually formed between the atoms of similar electronegativity. It can be of many types like sigma bond, pi bond etc. If a pair of electrons is shared, it's a single bond. If two pairs are shared, it's a double bond and if three pairs are shared, it's a triple bond.