Answer:
Fossils are used to determine the ages of rock layers. Index fossils are the most useful for this. Index fossils are of organisms that lived over a wide area. ... An index fossil allows a scientist to determine the age of the rock it is in.
Explanation:
Answer:
Explanation: Sperm travels in the fallopian tube which is the oviduct therefore
: sperm can survive inside your body for up to seven days , so conception can happen at any point in the week after sex
: sperm can swim up through your cervix, uterus, and fallopian tubes, searching for an egg. ... The ball of cells gets to your uterus about 3–4 days after fertilization, where it can float around for another few days: Above all
Sperm fertilizes an egg in the fallopian tube
Answer: Autotrophs , Heterotrophs
Explanation:
Answer:
B. Systemic blood pressure will be lowered.
Explanation:
Glomerular capillaries serve to provide a large surface area for glomerular filtration as they are long and extensive. Mesangial cells serve to regulate the available surface area for the process of filtration. When mesangial cells are relaxed, the maximal surface area is available. This results in a very high rate of glomerular filtration. On the other hand, contraction of mesangial cells reduces the available surface area, and thereby, reduces the rate of glomerular filtration.
Systemic blood pressure is the blood pressure in the blood vessels of the systemic pathway. The contraction of heart chambers during the pumping of blood is the source of systemic blood pressure. Therefore, the contraction of glomerular mesangial cells would not lower the systemic blood pressure.
Answer:
One parent will be red (RR) and the other will be white (rr)
Explanation:
Incomplete dominance is a genetic scenario whereby one allele of a gene is not completely dominant over the other, hence, both alleles form an hybrid that has a different phenotype from both parents. In this case, it involves a gene coding for flower colour in snapdragon plants.
Allele for red color (R) is incompletely dominant over the allele for white color (r). Hence both alleles form an heterozygous (Rr) pink phenotype (pink) that is a blending of both parents phenotype. A red flower color will be produced when the plant is homozygous for the red allele (RR) while the white flower colour will be phenotypically expressed when the plant is homozygous for the white allele (rr).
In this case where two parents where crossed to produce several hundreds of offsprings that exhibited the pink color (hybrid, Rr). This means that the parents were most likely red (RR) and white (rr).
That is, RR × rr ------- All Rr