D. <span>controlled
is the right answer because a</span><span>n </span>experiment<span> in which an observer tests a hypothesis by looking for changes carried by alterations to a variable.</span>
Answer: Posterior HoxA and HoxD genes play important roles in patterning along the proximodistal axis of the forelimb (10–13). They also are required for activating and maintaining Shh expression in the developing forelimb (6, 7). mark brainliest
Explanation:
<span>BROCA'S AREA
Broca's area or the Broca area is a region in the left frontal lobe of the dominant hemisphere of the hominid brain with functions linked to speech production.
Broca area, also called convolution of Broca, region of the brain that contains neurons involved in speech function. This was discovered in 1861 by French surgeon Paul Broca, who found that it serves a vital role in the generation of articulate speech.</span>
Answer:
abiogenesis
Explanation:
a (not) biogenesis (coming from other life forms)
Biogenesis would mean that it's coming from other life forms,
Natural selection is a part of evolution (what is there to select?)
Variation is also a part of evolution (not related)
