Biology Chapter 1: Biology: Exploring Life

Natural Selection – The first theory proposed by Charles Darwin
genetic drift – A change in the gene pool of a population due to chance; effects of genetic drift are most pronounced in small populations.
How can diffusion rate be increased? – – Shorter distance.
– Larger concentration gradient.
– Larger surface area.
Energy – Ability to do work; energy cannot be created or destroyed, only transformed.
Pentose – A 5-carbon sugar (ex: ribose)
receptor – a protein that detects a signal molecule and performs an action in response
The endocrine structure that regulates the anterior pituitary’s production of multiple hormones is:
Nucleolus – Organelle in a eukaryotic cell nucleus that produces ribosomes.
What is a saprophyte? – An organism that feeds on dead and decay materials.
The endоcrine structure thаt regulаtes the аnteriоr pituitary’s prоduction of multiple hormones is:
light dependent – light reactions
610. The first 3 months is called the first.. – Trimester
How long has life been on Earth? – Around 3500 million years- the first living things developed from simple molecules that could asexually reproduce (replicate themselves), in the harsh conditions of the Earth at this time.
Hydrolysis – Breaking down complex molecules by the chemical addition of water
Genes – The units of inheritance that transmit information from parents to offspring. Genes are grouped into longer molecules called chromosomes and control the activities of the cell.

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