Answer is A.
Archaea requires neither sunlight for photosynthesis as do plants, nor oxygen. Archaea absorbs CO2, N2, or H2S and gives off methane gas as a waste product the same way humans breathe in oxygen and breathe out carbon dioxide. An example is chemosynthetic bacteria by sea drifts. They use chemical energy to produce vital processes to live.
Answer:
provide protection against pathogens
Explanation:
Answer:
Estrogen and progesterone are both involved in preparing the endometrium for embryo implantation. Estrogen helps to ensure conception by increasing the amount of secretory glands in the uterus. Estrogen also increases blood supply to the endometrium.
Progesterone is crucial for embryo implantation and maintenance of pregnancy. Progesterone also enlarges secretory glands that produce carbohydrates, proteins and mucin that are required for embryo nourishment before implantation. Progesterone stabilizes endometrial muscles to prevent them from contracting during pregnancy.
Explanation:
- Estrogen and progesterone are steroid hormones of the reproductive system. Estrogen helps in conception whereas progesterone maintains pregnancy.
- Estrogen is secreted during the follicular phase of the menstrual cycle that promotes the growth and maturation of follicles in the ovary.
- Estrogen also induces oestrous behavior in females.
- Secreted by the corpus luteum, progesterone is also a steroid hormone, responsible for implantation of the embryo in the uterus.
Answer:
There are basically 4 components of Biosphere.
Explanation:
Biosphere is the collection of all ecosystems on earth and their interactions with each other. The Biosphere of earth consists the following components,
1. The Biota
All the living organisms including animals, plants, insects and bacteria is called the Biota.
2. Geosphere
Geosphere is the surface of biosphere that is composed of soil, rocks, mountains etc.
3. Hydrosphere
The hydrosphere includes all the water bodies like ocean, rivers, streams and lakes.
4. Atmosphere
Atmosphere is the climate that describes about the temperature, humidity, wind and rain fall in Biosphere.
When light reaction occurs in the stroma of chloroplast glucose is produced
