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biologyonline.com

https://biologyonline.com· First analyzed 01 May 2026· Updated 01 May 2026
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biologyonline.com
Desktop screenshot of biologyonline.com
Mobile screenshot of biologyonline.com
Mobile

Sponsored

Hosting Provider

WP Engine
wpengine.com

IP Address

141.193.213.20

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Austin, United States

ASN

AS209242

Organization

WPEngine, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

gail.ns.cloudflare.com.alexis.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
347 ms10%
Speed Index
451 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
188 KB
139 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.9.4
cms
bothemeCustom

Technology Stack

22 Technologies Detected

Plugins

8
Quiz Master Next
Contact Form 7
Wp_GlossarySassy Social ShareHcaptcha For Forms And More
WooCommerce
Yoast SEO
Elementor

Advertising

3
Google AdsCriteoTaboola

Icon Libraries

2
Font AwesomeMaterial Icons

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

Customer Support

1
Zendesk

Security

1
reCAPTCHA

SEO Analysis

B77/100
20
11
0
Meta Tags10/15
Content10/12
Headings5/8
Technical23/25
E-E-A-T2/7
Images6/7
Links2/5
URL5/5
Social4/5
Freshness4/4
Mobile3/4
Indexability3/3
B
biologyonline.combiologyonline.com

Learn Biology Online - Biology Articles, Tutorials & Dictionary Online

Biology Online is the world’s most comprehensive database of Biology terms and topics. Since 2001 it has been the resource of choice for professors, students...

Description truncated.
Title Length70 chars

Recommended: 50-60 chars (~406px / 580px)

Description Length214 chars

Recommended: 120-160 chars

Issues (0)

    11 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    13 URLs

    13 sub-sitemaps

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    19/100
    Poor
    6 12

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D42/100
    Bot Access
    20/25
    Machine Read.
    2/25
    Schema Data
    7/25
    Citation
    13/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:9%
    Words:9,187
    Token eff.:Excessive
    Sections/1K:0.1
    Depth:1/5

    Structured Data

    4 JSON-LD
    Organization×1.1WebSiteBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary44w
    Descriptive Headingsavg 1.1w
    Canonical URL
    Open Graph2/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    80/100
    13
    Passed
    3
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    73/100
    A+
    19 mg
    CO₂e / view
    188.0 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    22 mg
    vs
    Returning (cached)
    11 mg
    Annual (10K/mo)
    2.3 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    6 mg
    Device
    13 mg
    Resource Breakdown
    JavaScript
    134.5 KB
    HTML
    52.7 KB
    Other
    915 B
    Green Hosting Verified
    WP Engine
    Provider Match
    2 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    WAF

    61d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    CLOUDFLARE, INC.

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    02.04.2026

    Valid Until

    01.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    www.biologyonline.com

    SHA-256 Fingerprint

    69:88:BD:4E:EF:44:99:65:68:91:E0:F7:1A:CD:F1:83:D5:C6:79:F7...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ch
    Sec-CH-UA-Mobile
    alt-svc
    h3=":443"; ma=86400
    cache-control
    🟡 600s(max-age=600, must-revalidate)
    cf-cache-status
    DYNAMIC
    cf-ray🇫🇷 Paris
    9f51f56e8bca6f34-CDG
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    biologyonline.com

    Domain Age
    27y 1m

    Created

    31.03.1999

    Expires

    31.03.2027

    Last Updated

    04.04.2025

    Registrar

    GoDaddy.com, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Complianz

    Cookie Consent Banner
    Complianz
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Complianz
    Privacy policy page linked
    Legitimate interest basis mentioned

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    A
    82/100
    Mobile Friendly14 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Myriad Pro + Lato

    WCAG AA
    65/100
    Readability
    /30
    15/30

    13px · LH 1.50

    Hierarchy
    /20
    12/20

    4.31x ratio

    WCAG
    /25
    22/25

    4.61:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 7 req

    Heading Font

    Myriad Pro

    Sans56px

    Body Font

    Lato

    Sans13px

    Contrast Ratio

    4.61:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~37 CPL

    Narrow lines
    56px
    h1
    32px
    h2
    28px
    h3
    13px
    p

    ❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 28/100. Consider shorter sentences and simpler words.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.6:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 4.3x larger than body text.

    GGoogle FontsBuy on MyFontsFluid Type (rem)Flesch 28

    Color Palette

    5 unique colors
    5.74:1 AA Dark
    #666666
    Other· 71.2%
    #ffffff
    Background· 18.7%
    #eeeff1
    Primary· 3.7%
    #6e7a89
    Secondary· 2.2%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Ad Networks

    Google Ad ManagerMedia.netAmazon Publisher ServicesSovrnPubMaticOpenXIndex ExchangePrebid.js

    Sponsored

    Scripts & Styles

    26 Resources

    20
    Scripts
    6
    Styles
    11
    Async
    1
    Defer

    Top Script Sources

    biologyonline.com(8)googletagmanager.com(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)cdn.id5-sync.com(1)

    Website Identity

    Biology Online

    Biology Online

    Organization

    Biology Online is the world’s most comprehensive database of Biology terms and topics. Since 2001 it has been the resource of choice for professors, students, and professionals needing answers to Biology questions.

    www.biologyonline.com/
    27 years old
    Location detected: 🇺🇸 United Statesvia ip
    GoDaddy.com, LLCen-US

    Social Profiles

    FacebookX (Twitter)

    Sponsored

    Last analyzed: 01 May 2026 at 21:44

    Historical Analysis & Change Tracking