(D) Both perform photosynthesis is the observation that led researchers to propose that chloroplasts evolved from cyanobacteria.
Chloroplasts is the area where photosynthesis takes place. It is a green organelle in a plant cell. Pigments called the chloros in a chlorophyll are needed for the photosynthesis.
Cyanobacteria or blue-gree algae contains a blue photosynthetic pigment and a chlorophyll for photosynthesis.
Answer:
Image result for what is The recessive gene for blood typing
Because A is dominant, that means your mother could carry a hidden O. If she does then when she gets pregnant, each child has a 50% chance of getting her dominant A and a 50% chance of getting her hidden, recessive O. If the child gets the O from mom and an O from dad, he or she will have an O blood type.
Explanation:
Brainliest if right?
Answer:
c. one helix strand that runs from the 5' to 3' direction and the other strand runs from the 3' to 5' direction.
Explanation:
A DNA molecule has <em>two strands of nucleotides with a sugar phosphate backbone each, but orientated on the opposite direction </em>allowing for the base pairs to complement one another, making it a more stable structure. <em>When two biopolymers run parallel to each other but with opposite directionality (alignment) we have an antiparallel arrangement.</em>
I annexed an image of the DNA structure.
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In negative feedback processes, the resulting action will always be in the opposite direction of the stimulus.
<h3>What are negative feedbacks?</h3>
Negative feedback is a term used in association with homeostasis. It is the biological process used to antagonize a stimulus in order to return the body to homeostasis.
For example, the normal body temperature of humans ranges between 36.5 to 37 degree Celsius. Beyond this range, the normal body temperature has been breached.
If it is not returned to normal within a short period, such a person is at risk of suffering irreversible damage to their body or even death.
Thus, in order to return the body system to the normal body temperature, negative feedback will be activated. This feedback will work in the opposite direction to the process causing a breach of the normal temperature range.
By doing so, the body temperature will quickly return to normal.
More on negative feedback can be found here: brainly.com/question/11312580
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