Janelle was telling her mom about a dream where she was being chased by wolves. she said she ran and ran and when she woke up, her heart was beating rapidly, and she was very tired. which gland had secreted a hormone that cuased her body to respond in this way? the thyroid the thymus the pancreas the adrenal gland

The adrenal gland

Explanation:

The adrenal gland which is located above the kidneys produces adrenaline, a stress  hormone that invokes a flight-or fight-response in the body. The body will experience increased heartbeats, tightened muscles, dilated pupils, and sweating. This gland is under the regulatory influence of the hypothalamus-pituitary-adrenal (HPA) axis.

D the adrenal gland

Explanation:

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

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