I believe it is C) calcium-rich plates echinoderms and B) bones in mammals like vertebral
Answer:
They are to wait for at least one year.
Explanation:
Infertility maybe defined as trying to get pregnant without success despite having frequent sexual intercourse for a period of at least one year.
Answer:
Option D, Five radish plants are grown in sunlight, while another five radish plants are kept in the dark.
Explanation:
In a controlled experiment, impact of one independent variable is studied on the dependent variable.
Here in this study sunlight is the independent variable while the radish plant is dependent variable.
The researcher wants to study the effect of sunlight on radish plants when they are exposed to it and compare it to the effect created on radish plants that are kept in dark.
Hence option D is correct.
The correct answer should be <span>biosphere, atmosphere, and geosphere
Soil belongs to geosphere just like the nutrients, the carbon dioxide belongs to the atmosphere, that is the air, and the plant is a living being which is why it belongs to the biosphere.</span>
Decomposers
Producers
Primary consumers
Secondary consumers
Tertiary consumers
