Harry harlow became interested in studying baby monkeys to better understand the human need for question 9 options: a) classical conditioning b) love and attachment c) cognitive development d) observational learning

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.