What is true about chloroplasts? 1 Some plant parts appear green in color because they do not have chloroplasts inside them.

2 Animal cells have chloroplasts so that they can easily make their own food.

3 All plants are green, therefore all plant cells have chloroplasts in them.

4 Chloroplasts need sunlight to work, so they are found in the parts of the plant that get sunlight.

4 Chloroplasts need sunlight to work, so they are found in the parts of the plant that get sunlight.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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