Which of the following are photosynthetic autotrophs?
1)algae
2)plants
3)all bacteria
4)some bacteria
5)arthropods
6)protists

1. Algae, 2. Plants, 4. Some bacteria and 6. Protists are photosynthetic autotrophs.

Explanation:

Photosynthetic autotrophs are defined as the organisms that prepare there own food in the presence of sunlight through photosynthesis.

It is the mode of nutrition of all plants, algae, some protistans and some bacteria that use the energy obtained from sunlight to form glucose in the presence of carbon dioxide and water.

Examples of photoautotrophs are Kelp which is an algae, Euglena which is a protist, Cyanobacteria which is a bacteria.

Therefore, the correct options are "1. Algae, 2. Plants, 4. Some bacteria and 6. Protists"

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

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