<span>The answer is A -The red geranium is heterozygous for red flowers (Rr).
We know that the red flower, to be red needs to have at least a dominant allele, so it could be either Rr or RR.
Let's try both scenarios.
If the white</span><span> geranium (rr) is being crossed with RR, all the offspring would be red with genotype: Rr.
On the other hand, if the flower is Rr and it's being crossed with rr, that would result in </span><span>half of the new generation plants having red flowers and the other half white flowers.</span>
Answer:
When the calcium level is high in the bloodstream, the thyroid gland releases calcitonin. Calcitonin slows down the activity of the osteoclasts found in bone. This decreases blood calcium levels. When calcium levels decrease, this stimulates the parathyroid gland to release parathyroid hormone.
its adding co2 into the air also known as the green house gases
Answer:
C. Permian-Triassic
Explanation:
There have been several mass extinctions throughout Earth's history, more specifically five, at least from what is known so far. All of them share one characteristic, more than half of the species on the planet have died out in a very short period of time. Some extinction were more mild, while some very extreme. The most extreme one was the Permian-Triassic extinction with estimated 90-96% of the species going extinct. This extinction put end to the domination of the sinapsids, but from the smaller animals that survived through it, the dinosaurs and the mammals arose.
Answer:
Double displacement is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.
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Na2s + Hcl ------ Nacl + H2s
- Naoh + CaBr2 -------NaBr + ca(oH)2
