Fill in the blank 1) enzymes are biological that speed up chemical reactions in living organisms
2) enzymes are protein molecules, which are made up of long chains of
3) the sequence and type of amino acids are in each protein, so they produce enzymes with many different shapes and functions
4) the shape of an enzyme is very important ti its
words: different, catalysts, function, the same, amino acids

1. catalysts

2. amino acids

3. different

4. function

Explanation:

1. catalysts

2. amino acids

3. different

4. function

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:

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.