Aresearcher finds a that people who own more than two cars have bigger homes, more garage space and make more money than people who own one or two cars. her inference that having more than two cars causes people to have homes with bigger garages is lacking which type of causal evidence? 1. economic instability 2. temporal precedence 3. covariation of cause and effect 4. elimination of alternative explanations

The correct answer is 4.

Explanation:

According to Cook and Campbell's Experimental and Quasi-Experimental Designs for Generalized Causal Inference (2002), in order to establish a valid cause-effect correlation, three conditions must be met:

- Temporal precedence: the cause must occur before the effect.

- Covariation of cause and effect: changes in the cause must cause a change in the effect - they're linked together.

- Elimination of alternative explanations: the cause must be the explanation for the effect.

The researcher in the question has established a cause-effect relationship between owning two cars (cause) and having a home with a bigger garage (effect). However, she hasn't eliminated alternative explanations, like a people with a larger income owning a larger house and more cars, or even inverting the cause-effect relationship. Thus, her affirmation lacking causal evidence.

it is the boston port act

the answer is "meiosis ii in the mother".

the procedure of meiosis includes two divisions of the hereditary material. the main division is known as the decrease division – or meiosis i – on the grounds that it lessens the quantity of chromosomes from 46 chromosomes or 2n to 23 chromosomes or (n depicts a solitary chromosome set). in people, the decrease division results in two sperm cells each with 23 chromosomes or an egg cell with 23 chromosomes and one disposed of polar body. the second division – or meiosis ii – is called equational division. the two sperm cells split again creating four sperm cells, each with 23 or n chromosomes. in oogenesis, the egg cell and polar body partition to shape the ovum and two extra polar bodies. along these lines, the posterity are guaranteed to get one portion of the chromosomes from the mother and one half from the dad.