Excretory Products and their Elimination — BIOLOGY STD 11 Science — Question

Name the two hormones secreted by the follicular cells of thyroid.

Describe the functions of limbic system?

Protoxylem is the first formed xylem. If the protoxylem lies next to phloem what kind of arrangement of xylem would you call it?

After teaching cell division in the biology class, teacher asked the students to think and describe the role of mitosis in an adult, who has already attained maximum height. Read the above passage and answer the following questions.

1. What is growth?
2. Name atleast two other processes which involve cell division.
3. What value is expressed in the teacher's behaviour?

Mention any two symptoms that reflect the occurrence of growth.

If a person is fasting for a prolonged period, what will be the sequence of organic food to be digested by the body.

Write the scientific name of a member of Liliaceae, whose roots are used as blood purifiers.

Into which two stages is meiosis divided?

Explain urecotelic excretion. How does it help animals with this type of excretion?

Define climacteric.