Web cookies (also called HTTP cookies, browser cookies, or simply cookies) are small pieces of data that websites store on your device (computer, phone, etc.) through your web browser. They are used to remember information about you and your interactions with the site.
Purpose of Cookies:
Session Management:
Keeping you logged in
Remembering items in a shopping cart
Saving language or theme preferences
Personalization:
Tailoring content or ads based on your previous activity
Tracking & Analytics:
Monitoring browsing behavior for analytics or marketing purposes
Types of Cookies:
Session Cookies:
Temporary; deleted when you close your browser
Used for things like keeping you logged in during a single session
Persistent Cookies:
Stored on your device until they expire or are manually deleted
Used for remembering login credentials, settings, etc.
First-Party Cookies:
Set by the website you're visiting directly
Third-Party Cookies:
Set by other domains (usually advertisers) embedded in the website
Commonly used for tracking across multiple sites
Authentication cookies are a special type of web cookie used to identify and verify a user after they log in to a website or web application.
What They Do:
Once you log in to a site, the server creates an authentication cookie and sends it to your browser. This cookie:
Proves to the website that you're logged in
Prevents you from having to log in again on every page you visit
Can persist across sessions if you select "Remember me"
What's Inside an Authentication Cookie?
Typically, it contains:
A unique session ID (not your actual password)
Optional metadata (e.g., expiration time, security flags)
Analytics cookies are cookies used to collect data about how visitors interact with a website. Their primary purpose is to help website owners understand and improve user experience by analyzing things like:
How users navigate the site
Which pages are most/least visited
How long users stay on each page
What device, browser, or location the user is from
What They Track:
Some examples of data analytics cookies may collect:
Page views and time spent on pages
Click paths (how users move from page to page)
Bounce rate (users who leave without interacting)
User demographics (location, language, device)
Referring websites (how users arrived at the site)
Here’s how you can disable cookies in common browsers:
1. Google Chrome
Open Chrome and click the three vertical dots in the top-right corner.
Go to Settings > Privacy and security > Cookies and other site data.
Choose your preferred option:
Block all cookies (not recommended, can break most websites).
Block third-party cookies (can block ads and tracking cookies).
2. Mozilla Firefox
Open Firefox and click the three horizontal lines in the top-right corner.
Go to Settings > Privacy & Security.
Under the Enhanced Tracking Protection section, choose Strict to block most cookies or Custom to manually choose which cookies to block.
3. Safari
Open Safari and click Safari in the top-left corner of the screen.
Go to Preferences > Privacy.
Check Block all cookies to stop all cookies, or select options to block third-party cookies.
4. Microsoft Edge
Open Edge and click the three horizontal dots in the top-right corner.
Go to Settings > Privacy, search, and services > Cookies and site permissions.
Select your cookie settings from there, including blocking all cookies or blocking third-party cookies.
5. On Mobile (iOS/Android)
For Safari on iOS: Go to Settings > Safari > Privacy & Security > Block All Cookies.
For Chrome on Android: Open the app, tap the three dots, go to Settings > Privacy and security > Cookies.
Be Aware:
Disabling cookies can make your online experience more difficult. Some websites may not load properly, or you may be logged out frequently. Also, certain features may not work as expected.
Plant Anatomy and Development (taught at the University of Colorado)
Plant Anatomy is designed to serve as an introduction to the structure and development of cells and tissues in land plants. In order for students to learn about the potential interfaces of plant anatomy with other fields of study, diverse perspectives (evolutionary, ecological, functional, and cell biological) are brought to bear on the construction of the plant body. The use of plant anatomical information in forensics (crime scene analysis) is also a topic of study. As a consequence, students with interests as varied as ecology, plant physiology, and molecular biology consistently enroll in this course.
The concepts and information from class are applied to a hands-on set of laboratory sessions in which students study plant structure. Labs range from an examination of the diversity of microscopic crystals present in many plants to the analysis of the complex cell types that comprise diverse types of wood in trees. The goal of every lab is to insure that students experience and interact with the actual data that are the basis for the interpretation of evolutionary history and diversification. Through a substantial and sustained investment of student lab fees, each student works with a state-of-the-art digital imaging station (image above) to record plant structure through the microscope.
Plant Ecology, Evolution and Development (taught at the University of Colorado)
This course examines the central role of development in plant adaptation and response to the environment. We cover a set of central principles that can be used to analyze plants in all of their myriad complexity. Although plants are composed of only three organ types: leaf, stem, and root, these structures have been elaborated over the course of evolution to perform a diverse array of functions. For example, a leaf may function as a spine for defense, a home for ants, a trap for killing prey, a tendril to climb, and may even absorb nutrients much like a root. This course emphasizes the evolutionary transformations and developmental modifications that account for such diverse structures as well as their ecological function.
The laboratory sessions provide the opportunity to apply the principles developed in lecture to plants drawn from the department’s extensive living collection. Students use state-of-the-art digital imaging equipment, scanning electron microscopy, and histological techniques in the laboratory session.