*Question*
Gene flow occurs when individuals move into or out of a population, and internal migration describes moves within a country. Given these facts, migration increases what among the following options: - root growth - speed - distance - voltage - energy usage - Plants growth - gene flow - layers of fat
**Answer**
gene flow

*Question*
Acactus stem is used for storing water, and cactuses store water, serving as their own reservoirs and surviving long droughts. Given these facts, how does a cactus survive droughts among the following options: - It becomes dormant - It helps them survive - roots and shoots - high humidity - circulatory systems - roots to grow - Holding water in the stem - dormant state
**Answer**
Holding water in the stem

*Question*
Aruler is used for measuring the length of an object, and length indicates the buffer's size. Given these facts, what is used to indicate an object's size among the following options: - clock - shells - shape - ruler - colors - Sight - DNA - thoughts
**Answer**
ruler

*Question*
Unequal heating of Earth 's surface by the Sun causes global wind patterns, and due to changes in global wind patterns, some geographical areas can evolve into deserts. Given these facts, what can happen to some geographical areas due to uneven heating of Earth's surface by the sun among the following options: - Deserts can form - Dehydration - Mountains can form - Physical weathering - permineralization - Toast burns more often - Mars' surface gets too hot - It gets heated up
**Answer**
Deserts can form