19. Few plants can survive in a desert because there are many herbivores

the climate is too dry

too much leaching occurs

the sun is too hot

It is dry in deserts and hot too. There are special kinds of plants that grow in desserts means they have specialized characteristics which help them beat the dry and hot weather.

Succulent plants such as cacti, aloes, agaves have ability to store water in their leaves and stems which have thick and hard outer layer to avoid evaporation of water.

These plants have small spicules on their outer surface which protects them from animals as well.

So the answer is the climate is too dry.

Explanation:

the climate is dry

Explanation:

it doesn't rain much, and while a plant does need sunlight, it also need plenty of water.

i thinking chemical change

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.