EASY
10th CBSE
IMPORTANT
Earn 100

Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three states?

Important Questions on How Do Organisms Reproduce?

MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 11
Name any two sexually transmitted diseases (STDs). How do these infectious diseases spread from one person to another? Give two symptoms of STDs.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 12
What are the male and female gonads in human beings? State any two functions of each of them.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 13
What is fertilisation? Distinguish between external fertilisation and internal fertilisation.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 13
What is the site of fertilization in human beings?
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 14
Define the terms unisexual and bisexual giving one example of each.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 15
Explain the term implantation.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 15
Explain the term placenta.
MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 3 - How Do Organisms Reproduce?>EXERCISE - 3C>Q 15
What is the average duration (in months) of human pregnancy? (Write only number)