MCQ
The primitive environment was reducing because in it
- A$C{O_2}$was more
- ✓${H_2}$ was more
- C${O_2}$ was more
- D$N{H_3}$was more
✓
Answer
Correct option: B.
${H_2}$ was more
b
It's Obvious
It's Obvious
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
If liver from body is removed then which component of blood increases
A student was given a sample of two tissues. He observes the tissues under the microscope and draws their figures ( $1\;and\;2$) as shown below.
→Which one of the following pairs is incorrectly matched?
Statement I: An adult human excrete, on an average 1 to 1.5 litres of urine per day.
Statement II: Presence of glucose and ketone bodies in urine are indicative of diabetes insipidus.
Statement II: Presence of glucose and ketone bodies in urine are indicative of diabetes insipidus.
Coelom is absent in
Select the correct option for skeletal muscle.
→$(I)$ In human body, it is made of number of muscle bundles.
$(II)$ Muscle bundles contains a number of muscle fibers and fiber is lined by the sarcollemma.
$(III)$ In Muscle fiber, sarcoplasm contains only one nucleus.
$(IV)$ In muscle fiber, sarcoplasmic reticulum is the store house of calcium ions.
Dilation of blood vessels, increase in fat synthesis, low blood sugar and inflammation of stomach are due to the consumption of
Rate of breathing in an adult human is:
Which of the following is a helminth disease
Main function of cerebellum is