biology

Ruth Smith Lloyd

Ruth Smith Lloyd is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ruth Smith Lloyd rather than just read about it. In short: Ruth Smith Lloyd (January 17, 1917 – February 5, 1995) was a 20th-century scientist whose research focused on fertility, the relationship of sex hormones to growth, and the female sex cycle. She earned a PhD in the field of anatomy from Western Reserve University in 1941, making her the first African-American woman to have reached this achievement.

Key takeaways

Ruth Smith Lloyd belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ruth Smith Lloyd to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ruth Smith Lloyd from memory before moving on to harder problems.

Reference excerpt

Ruth Smith Lloyd (January 17, 1917 – February 5, 1995) was a 20th-century scientist whose research focused on fertility, the relationship of sex hormones to growth, and the female sex cycle. She earned a PhD in the field of anatomy from Western Reserve University in 1941, making her the first African-American woman to have reached this achievement. Lloyd worked on the faculty of medicine at Howard University from 1942 to 1977. She married physician Sterling Morrison Lloyd in 1939, and they had three children: Marilyn, Sterling and David. She died of cancer in 1995.

Early life and education Ruth Smith was born in Washington, DC on January 17, 1917. Her parents were Mary Elizabeth (Morris) Smith, who was a clerk in the US Treasury Department, and Bradley Donald Smith, who was a pullman porter. She had two sisters named Hilda B, and M Otwiner. She was the youngest child. Lloyd attended the prestigious, historically black, Dunbar High School. Lloyd attended Mount Holyoke College, which was then a mostly white institution. Her choice of college was reportedly influenced by the experience of her brother-in-law, William Montague Cobb, who was married to Hilda. Lloyd graduated with a bachelor of arts magna cum laude in 1937, majoring in zoology. From 1937 to 1938, Lloyd studied for a master's degree in zoology at Howard University supported by a fellowship, under Ernest Everett Just. She had planned on becoming a school teacher, but was encouraged to undertake further study. Lloyd gained a fellowship from the Rosenwald Fund and undertook doctoral studies under Boris Rubenstein at Western Reserve University in Cleveland, Ohio. She studied the fertility of macaque monkeys, and the vaginal smear technique, becoming the first African-American woman to gain a PhD in anatomy with her dissertation, Adolescence of macaques (Macacus rhesus) in 1941.

Career Lloyd taught at Hampton Institute in Virginia from 1941 to 1942, and then joined the medical faculty of Howard University in 1942. Lloyd worked at Howard until her retirement in 1977. She taught physiology and anatomy, reaching the rank of associate professor in 1955. Her areas of research were endocrinology, sex-related hormones, and medical genetics. Lloyd also chaired the university's Committee on Student Guidance and was director of the Academic Reinforcement Program. From 1947, the Department of Anatomy in which she worked was chaired by William Montague Cobb. She was a member of Sigma Xi honorary scientific society and the American Association of Anatomists.

Personal life Ruth Smith married Sterling Morrison Lloyd on December 30, 1939. He was a physician who also graduated from Howard University, and died in 1980. Lloyd had three children and eight grandchildren. In retirement, she was active in the All-Souls Unitarian Church, helped found the National Museum of Women in the Arts in 1987, and was a member of the social and service organization, Girl Friends. Lloyd died of cancer at home in Washington on February 5, 1995.

Worked examples

Example 1 — a first encounter with Ruth Smith Lloyd

Start with the simplest possible case. Write down what Ruth Smith Lloyd claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ruth Smith Lloyd before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ruth Smith Lloyd ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ruth Smith Lloyd

In research: Ruth Smith Lloyd appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ruth Smith Lloyd in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ruth Smith Lloyd is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1917 births, 1995 deaths, 20th-century African-American scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Ruth Smith Lloyd outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Ruth Smith Lloyd” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Ruth Smith Lloyd in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ruth Smith Lloyd means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ruth Smith Lloyd out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ruth Smith Lloyd in simple terms?

Why does Ruth Smith Lloyd matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ruth Smith Lloyd?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ruth Smith Lloyd.