List two possible explanations for why drinking milk could have provided strong favorable selection for lactase persistence.
Why might the cellular response to a peptide hormone be expected to be rapid compared to the cellular response to a steroid hormone? see section 46.2 (page 967) ?
Ecology is the study of interactions among organisms true or false
this statement is most definantly true
In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes___, whereas, in meiosis each has___? 16, 8 32, 8 4, 4 8, 16 64, 16
In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have 16 chromosomes, whereas, in meiosis each will have 8 chromosomes. The correct answer to the multiple-choice question is "16, 8".
Mitosis and meiosis are both processes of cell division, but they serve different purposes and result in cells with different numbers of chromosomes. Mitosis results in the formation of two daughter cells that are genetically identical to the parent cell and to each other, each with the same number of chromosomes as the parent cell. In the case of a parent cell with 16 chromosomes, following mitosis, each daughter cell will also have 16 chromosomes. Meiosis, on the other hand, is a two-stage process that reduces the chromosome number by half, producing cells that have half the genetic material. This reduction is crucial for sexual reproduction, allowing for the maintenance of species-specific chromosome numbers across generations. After meiosis, each resultant gamete cell will have 8 chromosomes if the starting cell had 16. This ensures that when two gametes (each with 8 chromosomes) fuse during fertilization, the resulting zygote will have the correct number of chromosomes, which is 16 in this example.
A blockage in structure a would directly reduce blood flow to the
to the question is that a blockage in structure a would directly reduce blood flow to the specific organ or tissue that the blocked vessel supplies. Without additional context, it's not possible to specify which organ or tissue would be affected, as 'structure a' is not defined within the question. However, in human anatomy, if 'structure a' refers to a major artery like the aorta or coronary arteries, then the blockage could lead to severe consequences such as a heart attack or stroke.
The
for this is rooted in the circulatory system of the body. Blockages within the circulatory system, such as those caused by blood clots or atherosclerosis, can significantly diminish or completely obstruct the flow of blood through the vessel. Blood is essential for delivering oxygen and nutrients to tissues, and without it, affected tissues can become ischemic, leading to cell death and potentially organ failure. It's important to recognize these events quickly as they are medical emergencies.
I'm not quite sure which is the right answer and I wanted to get a seconed opinion. Does anyone know the answer?
How is the global human population projected to change in the next 40 years?
A) decrease exponentially
B) increase exponentially
C) stop increasing
D) begin increasing
Is a period characterized by rapid physical growth and sexual maturation?
Which letter indicates the cavity that contains the digestive organs?
Compounds that inhibit receptors by preventing the natural messenger from binding are known as
What are the two little black dots at one end of the planarian called? What do they do for this organism?
Metaphase i is different because the ___ are lined up in the middle.
Which of the following structures are found in gymnosperms but not in angiosperms
Answer:
Complete Question: Which of the following structures are found in gymnosperms but not in angiosperms? A. Flowers B. Pollen C. Cones D. Seeds
Answer: C
Explanation:
Both found in plant organisms. Gymnosperms are the type of plants that have seed that do not flower, whereas angiosperms are the opposite they produce seeds that flower. the seeds in gymnosperms are naked, and the seeds on angiosperms are covered.
The seeds of gymnosperms are found in cones, scales and leaves, and the seeds of angiosperms are found in the ovaries.
Attached earlobes are recessive to free earlobes. what is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes? attached earlobes are recessive to free earlobes. what is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes? 25% 0% 50% 75%
The probability that a child of an individual with attached earlobes ('ff') and a heterozygous individual with free earlobes ('Ff') will have attached earlobes is 50%.
Explanation:The probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes can be calculated using Punnett squares. Since attached earlobes are a recessive trait, a person with attached earlobes has the genotype 'ff'. A heterozygous person with free earlobes has the genotype 'Ff'. When we cross these genotypes (ff x Ff), the possible genotypes for the offspring are Ff (free earlobe) and ff (attached earlobe).
The Punnett square for this cross would show that there is a 50% chance (2 out of 4) for the offspring to inherit the genotype 'ff' and therefore have attached earlobes. The other 50% would inherit the genotype 'Ff' and express the dominant trait of free earlobes.
Therefore, the correct answer is that there is a 50% chance for the child to have attached earlobes.
a limiting factor is always abiotic true or false
The food additive red dye no. 2 is known to cause cancer. as such, it is a __________.
While doing "jumping jacks" during an exercise class, your arms and legs move laterally away from the midline of your body. this motion is called ________. while doing "jumping jacks" during an exercise class, your arms and legs move laterally away from the midline of your body. this motion is called ________. adduction circumduction abduction flexion extension?
In performing jumping jacks, the arms and legs moving laterally away from the body's midline are engaged in abduction. This is different from adduction, circumduction, flexion, and extension.
Explanation:While doing jumping jacks during an exercise class, your arms and legs move laterally away from the midline of your body. This motion is known as abduction. Abduction refers to a movement that draws a limb away from the midline of the body, or the median plane. In contrast, adduction refers to a movement that pulls a structure towards the midline.
Circumduction, flexion, and extension are also movements that the body can perform, but they are not the correct words to describe the motion taking place when jumping jacks are performed. Circumduction involves a circular motion of a body part, while flexion represents bending a part, and extension refers to straightening it.
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During 'jumping jacks', the motion where your arms and legs move laterally away from your body's midline is called abduction.
Explanation:While doing jumping jacks during an exercise class, the motion in which your arms and legs move laterally away from the midline of your body is known as abduction. In human anatomy, abduction refers to a motion that pulls a structure or part away from the midline of the body. In comparison, adduction refers to the movement that pulls a structure or part towards the center of the body. Circumduction, on the other hand, represents circular movement of a limb, whilst flexion refers to a bending motion that decreases the angle between body parts and extension is straightening an angle.
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"what would happen to the range of cattle if the tsetse fly was eradicated"
The blood vessels that carry blood away from the heart are the: select one:
a. veins
b. venules
c. arteries
d. capillaries
What are the two networks of tubes in vascular plants called?
True or false? plague is endemic in wild rodent populations in the southwestern united states.
a. True
b. False
What substances move freely through the shell of the egg?
The correct answer is gases oxygen and carbon dioxide, which diffuse freely across the shell of an egg.
The four specialized membranes of the amniotic egg are amnion, chorion, yolk sac, and allantois. The chorion and the allantois exchange gases between the embryo and the air. Oxygen and carbon dioxide diffuse freely across the shell.
An eggshell refers to the outer covering of a hard-shelled egg and of some kinds of eggs with soft outer coats. The shells of the amniotic eggs are calcareous, formed of calcium carbonate.
When the body becomes dehydrated, a chemical signal is sent that causes nephrons in the kidneys to absorb more water and excrete more salts. This is an example of a _____. feedback loop heat stroke gas exchange carbon dioxide buildup
Answer:
Feedback loop
Explanation:
The ADH (Vasopressin - Antidiuretic Hormone) feedback loop is an example of negative feedback in the kidneys. Negative feedback occurs when the body works to counteract changes made to the body system. ADH is released when there isn't enough water (dehydration) so that the body can retain as much liquid as possible.
Describe the process of crossing over during prophase i and explain how genetic recombination occurs.
Which structure contains peptidoglycan in bacteria? What is the name of the structure?
Peptidoglycan is present in the cell wall of gram-positive bacteria. Bacteria are safeguarded by a robust cell wall comprising peptidoglycan. The layer of peptidoglycan in the cell wall of bacteria refers to a crystal lattice composition produced from linear chains of two alternating amino sugars, that is NAM (N-acetylmuramic acid) and NAG (N-acetylglucosamine). Peptidoglycans is one of the most essential sources of D-amino acids in nature.
Answer:
The answer is: B Granum.
Hope this helps <3 GL
Menstrual flow results in the discharge of select one:
a. the follicle.
b. the corpus luteum.
c. the endometrial lining of the uterus.
d. surface cells from the vagina.
e. blood from the blood vessels on the outer surface of the uterus.
Menstrual flow results in the discharge the endometrial lining of the uterus
Menstruation or menstrual cycle is a phenomenal occurrence in female humans. It occurs monthly for a certain period of the female's lifetime. Ideally, the ovary of a female produces one egg monthly. In response to this, the uterine wall is lined by the help of hormones called estrogen and progesterone. This lining occurs in preparation of a fertilized egg, which will travel to the uterus and start developing as a fetus. However, if fertilization (by a sperm cell) does not occur that month, the estrogen and progesterone levels start declining. This leads to the breakdown of the endometrial lining of the uterus and is discharged as blood via the vagina. This process is the result of menstrual flow.Learn more at: https://brainly.com/question/23843879
All the structures in order through which air passes as it is inhaled through the nares
Identify the pair of homologous structures. identify the pair of homologous structures. maple leaf and maple seed maple leaf and oak leaf neither of the above; plants do not have homologous structures.
Maple and oak share the same ancestors, therefore, The answer to the above question is maple leaf and oak leaf.
Homologous structures are those structures which have the same line of structure but have different function. They are distinctly modified to perform specific tasks. Homologous structure have a common ancestor, or else there will be no similarity in their structures. An example of homologous structure is a Human hand and a bat wing, which are identical but have been adapted to serve different function in different species. Forelimbs of amphibian, reptilians and mammalian are examples of homologous structures.
Henceforth, the looking at the similarities' maple leaf and oak leaf are homologous structures.
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bio help! will mark brainliest
which of the following is an example of prezygotic isolating mechanisms?
a. two strains of rice produce a hybrid, which can produce fertile offspring, but its offspring is small and sterile.
b. a horse and a donkey may interbreed, but the offspring, a mule, is not fertile.
c. the sperm of species A dies when It comes in contact with the female reproductive tract of species B.
d. two salamander species mate, but the offspring does not complete development and dies.
I think its b, but I'm not too good with stuff like this. So I thought I'd get a second opinion (and an explanation?). thank you tons!
Which would be warmer, the water in the surface zone of the ocean 200 miles north of the equator, or 2,000 miles north of the equator? Explain why.
Morgan breeds and sells snakes. he knows that he can make the most money by breeding and selling albino snakes. albinism is a recessive trait. his female albino corn snake just produced six offspring. two displayed normal coloration and four were albino. what do you know about the genotype of the baby snakes with the normal coloration?
a. they must be homozygous dominant.
b. they must be homozygous recessive.
c. they must be heterozygous.
d. they could be either heterozygous or homozygous dominant.
e. there is not enough information to determine their genotype but we know that they must carry the dominant allele.
Based on the given information, we can determine that the genotype of the baby snakes with normal coloration could be either heterozygous or homozygous dominant (option D).
What is albinism?Albinism is a genetic condition characterized by a lack or reduction of pigmentation in the skin, hair, and eyes. It is caused by a mutation in one or more genes that are responsible for the production of melanin, the pigment that gives color to our skin, hair, and eyes.
This mutation disrupts the normal production or distribution of melanin, resulting in a range of symptoms including very light or white hair, pale skin, and light-colored or pinkish eyes. People with albinism are often more sensitive to sunlight and have a higher risk of sunburn and vision problems. Albinism can occur in humans as well as in animals across various species.
Since four of the offspring were albino, it can be inferred that the female albino corn snake is homozygous recessive (aa) for the albinism trait.
Since the female snake produced offspring with normal coloration, it means that she must carry the dominant allele for coloration. The normal-colored baby snakes could have inherited either a dominant allele from the mother (Aa) or two dominant alleles (AA) if the mother is homozygous dominant. Therefore, the normal-colored baby snakes could be either heterozygous (Aa) or homozygous dominant (AA).
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