Answer:
the organelle that regulates cell function and contains the DNA is a nucleus
Assume similar data for the motion of the blood in a carotid artery which connects the aorta to the brain. Estimate how many beats of the heart it will it take the blood to get from your aorta to your brain. (Assume that the distance from your aorta to your brain is 30 cm.)
Answer:
4 beats
Explanation:
The number of beats of the heart that will take blood from Aorta to The Brain
n = Distance from Aorta to brain / distance per beat
Given that distance per beat = 7.5 cm ( calculated value outside scope of question using the data attached below)
n = 30 cm / 7.5 cm
= 4 beats
Which of the following qualify as germs? Select all that apply.
A. Bacteria
B. Fungi
C. Protozoa
D. Viruses
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Thanks to DNA testing, scientists have discovered that a tree in South America is genetically similar to one in Australia. What is one possible evolutionary inference they could make from this discovery
Answer:
Both species share a common ancestor that lived when the Earth had supercontinents
Explanation:
Gondwana was a supercontinent that existed about 550 million years ago (Neoproterozoic Era) and began to break up about 180 million years ago (Jurassic period). During this period, Gondwana gradually broke up into the continents we know at present, and it has been proposed that about 140 million years ago Africa/South America started to separate from Australasia/India/Antarctica (Cretaceous period). On the other hand, DNA testing is a method based on the comparison of genetic sequences that can help to determine the ancestral history of different individuals, populations and species by determining the homology level between DNA sequences. In this case, sequence homology can be used to infer evolutionary relationships between species separated by a geographic barrier (i.e., South America and Australia are separated by the Pacific Ocean), thereby suggesting the existence of past supercontinents and also suggesting that both species share a common ancestor that lived when the Earth had such supercontinents.
which of the following criteria could Not be used to determine how closely related two types of organisms are?
A. developmental stages
B. DNA sequence
C. occurrence of both organisms in the same habitat
D. the presence of homologous structures
Answer:
The answer is c because different types and species of organisms can live in the same habitat so the mere fact that both organisms live in the same habitat doesn't mean they are closely related.
what morpholoical features do whales have that woule suggest whales are more closely reltaed to humans than fish
Answer:
1. mammary glands
2. vertebral column
3. four limbs
Explanation:
Whales and humans have many more detailed features in common (homologies) than do whales and fish because whales and humans share a most recent common ancestor. Whales and humans are mammals (Class Mammalia), whereas fish are not mammals. First, both whales and humans have mammary glands: whales have mammary glands on the chest and stomach (like other mammals). Second, nearly all mammals have a vertebral column composed of 7 cervical vertebrae (humans and whales are not an exception to this rule). Like other mammals, whales have four limbs: although whales are adapted to live underwater, they evolved from a terrestrial mammal ancestor that once walked on four legs (about 50 million years ago).
What consist of a cell body that contains the 
Answer:
The cell body, or soma, contains the nucleus of the cell and its associated intracellular structures. Dendrites are specialized extensions of the cell body.
Explanation:
Which rock layer is probably the oldest?
A.
3
B.
5
C.
2
D.
4
Answer:
3
Explanation:
Answer: 4
Explanation: THE OTHER ANWSER IS WRONG
Pls help
Which type of reproduction provides organisms with the following advantages? Desirable traits can be selectively bred for in a population of organisms. More genetic diversity that might benefit individuals when environment changes.
A. Asexual reproduction
B. Sexual reproduction
* Identify the organelle that makes energy for the cell
O Nucibus
O Mitochondria
O Golgi Apparatus
O Cell Membrane
Answer:
O Mitochondria
Explanation:
Answer:
b
Explanation:
The mitochondrion (plural mitochondria) is a membrane-bound organelle found in the cytoplasm of eukaryotic cells. It is the power house of the cell
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What is the % phenotype for this cross if round is the dominant trait?
A. 25% round, 75% wrinkled
B. 50% round, 50% wrinkled
C. 75% round, 25% wrinkled
D. 100%, round, 0% wrinkled
Answer:
100% Heterozygous Dominant (Rr)
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A change in a gene or chromosome that causes a new trait to be inherited is called a
Answer:
I think the answer is a gene mutation.
Explanation:
A gene mutation is a change in one or more genes.
Warm air masses tend to flow only towards the North Pole.
True or false?
Answer:
true
Explanation:
An air mass acquires its characteristics from the region over which it forms, called its source region. ... Cold air masses tend to flow toward the equator, and warm air masses tend to flow toward the poles. This movement of air masses brings heat to cold area
What would be the correct complimentary base pair be for a DNA strand with the following sequence...
ACGTGA
A. TGCACT
B. GGCTA
C. OTGAACT
Answer:
Explanation:
A TGCACT
The correct complementary base pair for the DNA sequence ACGTGA is TGCACT (Option A).
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of nucleotides linked by hydrogen bonds.In DNA, there are four types of nucleotides, each one containing one different nitrogenous base (i.e., Cytosine, Guanine, Adenine and Thymine).According to the base pair rules, Adenine always pairs with Thymine, while Cytosine always pairs with Guanine.In conclusion, the correct complementary base pair for the DNA sequence ACGTGA is TGCACT (Option A).
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What is described: Retinitis Pigmentosa is a genetically inherited eye disease that only men get
A- incomplete dominance
B- basic dominance/mendelian inheritance
C- co-dominance
D- sex-linked
E- multiple alleles
Answer:
D
Explanation:
Answer:
The answer for this question is that sex-linked.
What are the long cells called Tracheids
Some plant seeds have special spiky barbs that can easily get tangled in an animal's fur. The spiky structure of these seeds most likely benefits a plant by
A. keeping animals far away from the parent plant.
B. keeping the seeds from being moved away from the parent plant.
C. attracting pollinators with their bright color and fruity smell
D. helping the seeds to be scattered in new areas to grow.
g About how much of the energy in the producers of an ecosystem will be available to secondary consumers in this ecosystem
Answer:
10 %.
Explanation:
Only 10 % of energy in the producers of an ecosystem will be available to secondary consumers of that ecosystem while the remaining 90 % will be lost and releases in the atmosphere in the form of heat energy. In each trophic level, only 10 % of the total biomass is transferred from one trophic level to another trophic level while the remaining biomass is released in the form of heat. If the producers has 1000 calories of energy, only 100 calories will be transferred to the primary consumer.
1
Correct
How is a scientific law different from a scientific theory?
A.
A theory becomes a law after a long period of time has passed.
B.
A theory is why something happens and a law is how something happens.
C.
A theory cannot be disproved but a law can be disproved.
D.
A theory is used for biology and chemistry and a law is used for physics.
Next
The correct answer is B. A theory is why something happens and a law is how something happens.
Explanation
A scientific theory is a way of describing why chemical and physical phenomena originate. An example of this can be the theory of Charles Darwin on the Evolution of species. In this theory, Darwin set out to explain why the evolution of species and what influenced this development. On the other hand, a scientific law is a description of how some of the phenomena of nature occur. For example, Isaac Newton's Law of Universal Gravitation was intended to describe the gravity. From the above, it can be inferred that the correct answer is B. A theory is why something happens and a law is how something happens.
please help with my biology
Answer:
Negative feedback
Explanation:
Try to bring the variable (temperature) down to normal set point is negative feedback
During frog gastrulation, involution occurs at the Group of answer choices endometrium. blastopore blastocoel. trophoblast. archenteron.
Answer:
blastopore
Explanation:
Involution is the second stage after invagination during frog gastrulation. Involution occurs at the blastopore when the marginal zone cells get to the tip of the blastopore, make an inward turn and then move along the inner exterior of the outer cells sheets.
This means that the cells found at the lip of the blastopore and always undergoing change and the first of these cells to develop into the dorsal lip are the endodermal cells. Next are the mesoderm cells that form the Notochord.
If you were dropped off in the wilderness to survive for two months, what 12 things would you take with you? They must be items that would fit in a backpack.
^^
Answer:
Map & Compass. Technology can be a great tool, especially with GPS, however it's important to not solely depend on your smartphone when you're lost in the backcountry. ...
First-Aid Kit. ...
Signal Mirror. ...
Fire Starter. ...
Water Purification System. ...
Knife. ...
Cordage. ...
Fishing Line and Hooks.
Answer:
knife, lighter, flashlight, portable camp,
Explanation:
True or false: If we extracted DNA from thyroid and neural tissues, we would find the CALCA gene in both types of cells.
Answer:
True
Explanation:
The calcitonin/calcitonin gene-related peptide (CALCA) gene is used to encode different peptide sequences (i.e., calcitonin hormone, calcitonin-related peptides and katacalcin) through alternative RNA splicing. These peptides have different functions. Calcitonin is a hormone mainly produced by cells of the thyroid gland, which is involved in the control of levels of calcium and phosphate in the blood. Moreover, katacalcin is a peptide synthesized from the same precursor of calcitonin (and therefore also mainly produced by cells of the thyroid gland), which is implicated in both calcium regulation and skeletal maintenance. Finally, the calcitonin gene-related peptide (CGRP) is a peptide mainly produced by sensory nerves (type Aδ fibers ), which is involved in pain pathways. The CALCA gene has attracted considerable attention from geneticists because it is specifically expressed in neuroendocrine tissues in normal conditions and abnormally induced in septic conditions (i.e., during the body's extreme response to an infection).
The flow of genetic information is controlled by a series of biochemical reactions that result in the production of proteins, each with its own specific order of amino acids. Choose the series of biochemical reactions in the correct order from the options presented here.
(a) replication, transcription, translation.
(b) replication, translation, transcription.
(c) translation, transcription, replication.
(d) translation, replication, transcription.
Answer:
A
Explanation:
As with DNA replication, partial unwinding of the double helix must occur before transcription can take place, and it is the RNA polymerase enzymes that catalyze this process. ... The DNA molecule re-winds to re-form the double helix. In the first step, transcription, the code in the DNA is copied to a different nucleic acid, RNA. In the second step, translation, the nucleic acid code in RNA is changed into a new form: amino acids. This step is called translation because the nucleic acid language is being "translated" into the protein language.
How can we measure motives?
Which statement is true regarding the way in which sex chromosomes are passed on to offspring? Females can pass only Y chromosomes to their offspring. Females can pass either an X or a Y chromosome to their offspring. Males can pass either an X or a Y chromosome to their offspring. Males can pass only Y chromosomes to their offspring.
Answer:
Males can pass either X or Y to their offspring's
Explanation:
Males determine the age (not on purpose) females have the kid
Males can pass either an X or a Y chromosome to their offspring, while females can pass only an X chromosome to their offspring. Therefore, the statement that is true regarding the way in which sex chromosomes are passed on to offspring is: "Males can pass either an X or a Y chromosome to their offspring."
What is the function of sex chromosomes ?Sex chromosomes determine the sex of an individual and are responsible for the inheritance of sex-linked traits. In humans, there are two sex chromosomes: X and Y. Females have two X chromosomes, while males have one X and one Y chromosome.
During sexual reproduction, the sex chromosomes are passed on to offspring from their parents. The father can pass on either an X or a Y chromosome to his offspring, while the mother can only pass on an X chromosome. This means that the sex of the offspring is determined by the father's contribution of either an X or Y chromosome.
If the father contributes an X chromosome, the offspring will be female (XX). If the father contributes a Y chromosome, the offspring will be male (XY). This means that while the mother's contribution is always an X chromosome, the father's contribution determines whether the offspring will be male or female.
Sex-linked traits, such as color blindness and hemophilia, are carried on the X chromosome. Because females have two X chromosomes, they can be carriers of these traits without exhibiting symptoms themselves. However, males only have one X chromosome, so they are more likely to exhibit symptoms of sex-linked traits if they inherit a faulty gene on that chromosome.
Overall, the inheritance of sex chromosomes plays an important role in determining the sex of an individual and can influence the inheritance of sex-linked traits.
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utiliza el calor producido por un reactor nuclear
Answer:
Boil water into steam
Explanation:
As the turbine blades turn, they drive generators that make electricity. Nuclear plants cool the steam back into the water in a separate structure at the power plant called a cooling tower, or they use water from ponds, rivers, or the ocean. The cooled water is then reused to produce steam.
One person pushes to the left on a big rock. What are two ways a friend can apply a push or pull to help him?
Answer:
his friend can push the rock with him (on the left side) for his friend could pull (from the right side)
What are the applications of CRISPR/Cas9-mediated Epigenetic Editing?
The CRISPR/Cas9 with the advantages of low cost and ease of use gives researchers the opportunity to manipulate the epigenome and observe its possible effects on cell function, development, and differentiation (Figure 1). Using non-active dCas9 (another type of Cas9 lacking nuclease activity but retaining DNA binding activity) fused enzymes such as DNA methylase, histone acetyltransferase, and deacetylase can be targeted to alter the epigenetic state of precise locations within the genome.
https://www.creative-biogene.com/crispr-cas9/solution/crispr-cas9-mediated-epigenetic-editing.html
Answer:
Applications:
- silence gene expression of target genes
- activate gene expression of target genes
- determine the role of DNA methylation and histone modifications (methylation, acetylation, etc) on specific regulatory sites (e.g., enhancer sequences)
Explanation:
The CRISPR/Cas9 system can be repurposed to edit the epigenome of living cells. For this purpose, it is required 1-to fuse a catalytically inactive 'dead' Cas9 enzyme with enzymes involved in epigenetic mechanisms (e.g., DNA methyltransferases, histone deacetylases, etc) capable of activating or deactivating gene expression, and 2-to design single-guide RNAs (sgRNAs) complementary to the sequence of interest (i.e., target sequences whose epigenome landscape we are trying to modify). For example, dCas9 gene has been fused with the DNA methyltransferase 3a (Dnmt3a) gene to create a dCas9-DNMT3A complex which can be combined with a specific sgRNA in order to study the effects of DNA methylation at a particular gene. These CRISPR/Cas9-mediated epigenome editing systems have shown to be very useful to understand how epigenome drives chromatin folding and dynamics at specific genomic sites (loci), and thus regulate gene expression at the transcriptional level.
6. Which statement describes evolution?