How do you know how old a tree is?

Which epidermal layer is not distinguishable in thin skin, and stains poorly in thick skin?

What is the purpose of redox reactions in the cell? to produce NAD + and other electron carriers to produce glucose and other carbohydrates to carry oxygen to cells throughout the body to release energy slowly in a step-by-step process

6. Feather length in a species of birds is controlled by one gene. The L allele is for long feathers, while the I allele is for short feathers. Write the 3 possible genotypes found in this species of birds.

The fur of mammal what them from the cold

Which biotic factor would limit the antelope population in the African savanna? A) bacteria B) lions Eliminate C) rainfall D) zebra

Question 18 Which term best describes the diagram below? Eye color Blood type . Hair color Growth

Why did mendels use characteristics that only had 2 options? how did this aid in the development of his theories?

8. Modern fishing practices threaten biodiversity mainly through the

What is transpiration, and how does it occur within a plant

Describe each of the four mechanisms that cause air to rise.