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maxonik [38]
3 years ago
6

How do you calculate degree of freedom for chi square

Biology
1 answer:
natka813 [3]3 years ago
6 0

Generally, you can calculate it with this formula: df = (r-1)(c-1) where r is the number of rows and c is the number of columns.

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What level of organization that is a group of tissues working together?
ANEK [815]

Answer:

Organs

Explanation:

Tissues are groups of similar cells that have a common function. An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.

5 0
3 years ago
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Please help!!
koban [17]

Answer:

meiosis

Explanation:

When cells divide during meiosis, homologous chromosomes are randomly distributed during anaphase I, separating and segregating independently of each other. This is called independent assortment.

8 0
3 years ago
Please help!
pogonyaev
It is believed that the tilapia fish was introduced into the mangrove system by escaping from fisheries and aquariums by accident, but this species is also used to control the population of mosquitos to prevent outbreaks of malaria and other invasive species on which they feed.
The tilapia are highly tolerant and easily adaptable to different conditions in the mangrove ecosystem and they are highly efficient predators. This often makes them more successful in the environments where they are introduced than the indigenous species, which results in disruption of the food chain.
The negative human impact on mangroves disrupts the balance in the mangrove ecosystems, weakening the populations of different species that originate from mangrove forests. This leaves more space and resources to be exploited by the tilapia. 
The strategies to control tilapia in mangrove ecosystems focus on restoring the habitat and strengthening the populations of indigenous species while decreasing the numbers of tilapia.
The species can be eradicated by selective overfishing of the species or by introducing another species into the habitat which is a natural enemy of the tilapia. 
4 0
3 years ago
What is a period with below-average precipitation called?
TEA [102]
Dry season? I think
8 0
3 years ago
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Which of these is a function of the blood? a) carry oxygen to the cells b) carry wastes to be removed c) both are functions of b
damaskus [11]

Answer:

c) Both are functions of blood, that is, to carry oxygen to  the cells and also remove wastes from the body.

Explanation:

Blood is a form  of connective  tissue and is made up of red blood cells,  white blood cells, platelets and blood plasma. The red blood cells contains a metallo-protein structure known as hemoglobin. This hemoglobin binds to the oxygen and carry them to the cells and the tissues for proper functioning of them. The waste products like carbon dioxide is carried by the blood from the body tissues to expel it out from the body.

7 0
3 years ago
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