Which of the following nitrogen bases in unique to rna?

Uracil

Thymine

Cytosine

How do carrier proteins differ from channel proteins in their role as gatekeepers of the cell? carrier proteins expend energy to pump substances across the membrane against a concentration gradient, whereas channel proteins provide passage via

Where is MOST of the carbon on Earth stored? A) soil and air OB) plants and soil c) animals and air D) plants and animals

An ecosystem is made up of two components: O abiotic (living) and biotic (non-living) O Land and organisms O abiotic (non-living) and biotic (living) O Earth and atmosphere

Which type of dermal tissue is commonly known as bark?

What characterizes speciation in new areas, such as a recently formed island?

Animal waste decay by the action of bacteria witch create

What is the chance that a human zygote will receive one X and one Y sex chromosome during fertilization?

How many Earth years would you need to live in order to be two on Neptune?

A characteristic of acids is that they react with metals to: form non-metals release water release hydrogen gas produce bases

Which of the following elements has the largest atomic radius? Silicon Aluminum Sulfur Phosphorous