Answer:
Pyramid of numbers represents the number of individual organisms at each trophic level. Pyramid of biomass represents the biomass present at each trophic level while pyramid of energy shows the energy available at each trophic level. All three types of pyramids are useful for characterizing ecosystem structure.
The zipper-like complex that forms in meiosis occurs during __________ and is called the __________.
what gas is released by plants during photosynthesis
Answer:
oxygen po
Explanation:
pa brainliest pls
A solution consists of 24 g of table salt
dissolved in 2 L of water. Express the
concentration of salt in the form of a ratio
Answer:
24 g of salt: 2 L of water
or
12 g of salt: 1 L of water
which organism moves with tube feet controlled by a water vascular system?
Answer:
echinoderms
Explanation:
The left side of the heart pumps oxygen-rich blood throughout the body in a process called ______ circulation.
Systemic circulation is a process through which oxygenated blood is pumped throughout the body of a living organism by the left-side of a mammalian heart.
Cardiac cycle can be defined as a complete heartbeat of the mammalian heart, which typically comprises sequential alternating contraction and relaxation of both the atria and ventricles, therefore causing oxygen-rich blood to flow unidirectionally (in one direction) throughout the human body.
Systemic circulation is a process that is responsible for the transportation of oxygen-rich blood from the left-side of the mammalian heart throughout the body of a living organism.
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What adaptations allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes
Answer:
Stomata, tracheids, a waxy cuticle
Explanation:
The adaptations that allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes is the presence of stomata, tracheids and a waxy cuticle. Therefore, the correct option is D.
What are the adaptations of vascular plants?Vascular plants have several adaptations that allow them to thrive in terrestrial environments that bryophytes, such as mosses and liverworts, cannot colonize. These adaptations include stomata, tracheids, and a waxy cuticle.
Stomata are small pores on the surface of leaves that allow for gas exchange, which is essential for photosynthesis. Tracheids are specialized cells that make up the xylem, a tissue that transports water and nutrients throughout the plant. A waxy cuticle is a layer of waterproof material that covers the surface of leaves and stems, preventing excessive water loss and protecting the plant from damage.Together, these adaptations allow vascular plants to thrive in a wide range of terrestrial environments, from arid deserts to humid rainforests. Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,
What adaptations allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes:
A. stomata,
B. tracheids,
C. a waxy cuticle
D. All of the above.
A blood stain that impacts a surface at a low angle will have a ________ tail than one that impacts at a higher angle.
What does weight measure?
A. the force of gravity
B. an object's mass
C. an object's velocity
D.an object's density
Answer:
the Force of gravity
Explanation:
im not fully sure but i personally think it would make sense
A
For example, your mass is the same on different planets but your weight would be different because there may be more or less gravitational pull
I hope this helped :)
The spleena. filters damaged red blood cells from the blood.b. changes undifferentiated lymphocytes into competent lymphocytes.c. is necessary for life. It can't be removed without causing death.d. produces several different hormones with unknown function.e. has additional digestive functions.
Answer:
filters damaged red blood cells from the blood.
Explanation:
a strand of dna that will pair with AATTCGTAATTGGCTAG
Answer:
lol what?
Explanation:
A base pair is two chemical bases bonded to one another forming a "rung of the DNA ladder." The DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Answer:
TTAAGCATTAACCGATC
Explanation:
Thymine (T) pairs with Adenine (A)
Cytosine (C) pairs with Guanine (G)
During an action potential, voltage-gated potassium channels open after voltage-gated sodium channels. The effect this has on the membrane potential is ______.
The effect that the opening of voltage-gated potassium channels on the membrane potential is it becomes less positive and more negative. These channels allow the entry of potassium (K+) ions into the cell.
At the resting potential, the cell is more negatively charged than the outside the cell.
This negative charge is caused by the accumulation of more sodium (Na+) ions outside the cell than potassium (K+) inside the cell.
When potassium (K+) channels open, the cell becomes more negative because more positive ions leave the cell (hyperpolarized).
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The role of an enzyme in a chemical reaction is to change which of the following
The function of an enzyme is to speed up chemical reactions. They do this by lowering the activation energy, which is the minimum energy that must be available for a chemical reaction to occur. ... Thus the correct answer is an enzyme changes "the activation energy of the reaction."
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Body temperature is mostly regulated by which of the following systems? Select all
answers that apply.
Select 2 correct answer(s)
skeletal system
circulatory system
integumentary system
reproductive system
what phrase is used to describe the structure of dna
Answer:
genome
Explanation:
The term "double helix" is used to describe the shape of DNA. This term is used to characterise the lengthy, double-stranded molecule of DNA's three-dimensional structure.
Two strands of nucleotides that are twisted around one another, resembling a spiral staircase, make up the double helix structure of DNA. The complementary base pairs of the nucleotides form hydrogen bonds that hold the two strands of DNA together.
Adenine (A) and thymine (T) and guanine (G) and cytosine (C) are the base pairs in question. During DNA replication and transcription, the strands may readily split and reunite thanks to the double helix shape of DNA. Additionally, the double helix shape permits the storing of genetic data in a small space.
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a. According to Model 3, which of the following diagrams correctly show an original set of
homologous chromosomes (grey) and their sister chromatids (black)—the replicated portion?
ХХ ХХ ХХ ХХ
XX
The diagrams to answer the question are missing. However, an original set of homologous chromosomes and their sister chromatids should look like a column of one color for the homologous and another column of the same color but join with the original column by the centromere for the sister chromatid.
A chromosome is a molecule of DNA; it stores and transmits genetic information. Chromosomes have different parts and structures.
A homologous chromosome is:
A pair of DNA molecules that have two different genetic information.Each chromosome comes from one progenitor. It has its respective genetic information.A sister chromatid is:
The replication of the homologous chromosome. They carry the same information.
In conclusion, an original set of homologous chromosomes and their sister chromatids will look like the one shown in the image. Two lines of a different color for the homologous chromosome and "X" of the same color for the sister chromatid, since it is a chromosome that it replicated itself and is joined to the original one by the centromere.
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In the ___________, antibiotic paper disks are added to a solid medium inoculated with a standard amount of a pure bacterial culture to test whether the organism is sensitive, intermediate, or resistant to the drug.
Answer:
Kirby-Bauer Test
Explanation:
How can scientists determine when these ancient animals lived?
1. normally, sodium and potassium leakage channels differ because ___________________.
Answer:
sodium ions diffuse through leakage channels into the cell, but potassium ions diffuse through leakage channels out of the cell
Explanation:
_ _ _ _ _ _ _ser is a consumer that breaks down the remains
of plants and animals
A population of 1,000 birds exists on a small Pacific island. Some of the birds are yellow, a characteristic determined by a recessive allele. The others are green, a characteristic determined by a dominant allele. A hurricane on the island kills most of the birds from this population. By chance, only ten birds remain, and those birds all have yellow feathers.
Below are several statements about this hypothetical situation.
a. Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain both green and yellow birds.
b. Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain only yellow birds.
c. This situation represents diversifying selection.
d. This situation represents directional selection.
Answer:
b. Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain only yellow birds. Explanation:
Higher organisms use nitrogen to make _____________________. e. Animal wastes decay by the action of bacteria which create __________________and_________________ products rich in nitrogen, and useful for plants to use again.
Answer:
Ammonia and nitrate
Explanation:
prior to the work of mendel, inheritance was viewed as resulting from ______
Prior to the work of Mendel, inheritance was viewed as resulting from the BLENDING of phenotypic traits within fixed, unchanging species. Mendel discovered how traits are inherited across generations.
Mendel was a scientist who experimented on pea hybrids and now he is known as the father of modern genetics.
The Mendel principles include:
The Law of Segregation posits that phenotypic inherited traits can be controlled by two 'factors' (i.e., alleles), which separate (i.e., segregate) and pass into germinal gametic cells.The Law of Independent Assortment posits that these factors do not depend upon each other, but instead, alleles are independently sorted into germinal (gametes) cells.Learn more in:
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Explain how plants obtain, transport, and release gases, and water
Answer:
Plants take up the water that they need from the soil through their roots. Carbon dioxide is a gas found in the air; plants can take in this gas through tiny holes in their leaves. Once they have water and carbon dioxide, they can use energy from sunlight to make their food.
Explanation:
which nervous system transmits only excitatory signals to effector cells?
Answer:
Explanation:
Sensory afferent neurons convey information from tissues and organs into the central nervous system. Efferent neurons transmit signals from the central nervous system to the effector cells and are sometimes called motor neurons. Interneurons connect neurons within specific regions of the central nervous system.
Within a plant leaf, most photosynthesis occurs in cells called ______ cells, which are often interspersed with air spaces to maximize gas exchange.
Answer:
The spongy mesophyll is the kind of cell described.
Explanation:
"Most of the interior of the leaf between the upper and lower layers of epidermis is a parenchyma(ground tissue) or chlorenchyma tissue called the mesophyll (Greek for "middle leaf"). This assimilation tissue is the primary location of photosynthesis in the plant."
The main layers of the leaf are the cuticle, which is the "skin," the palisade mesophyll (the second topmost layer of cells), the spongy mesophyll, which is lower, and the lower cuticle. The spongy mesophyll is so called because it consists of leaf cells interspersed with air, which maximises their access to oxygen.
What does Homologous mean?
having the same relative position, value, or structure
12. When you rub the skin of a shark from head to tail, it feels very smooth, but when you rub it
towards the head, it is rough like sandpaper. This is because the scales that make up its skin
point towards the tail to reduce friction. This would be an adaptation for
a. Feeding & Digestion
b. Locomotion
C. Buoyancy Regulation
d. Circulation & Gas Exchange
Answer:
b. Locomotion
Explanation:
Reduction of friction helps faster movement.
The lower the friction, the faster the shark can move.
What is the difference between osmosis and osmotic pressure?
Answer:
Osmosis is the flow of a solvent into a solution through a semipermeable membrane. Osmotic pressure is the pressure that stops the process of osmosis. Osmotic pressure is a colligative property of a substance since it depends on the concentration of the solute and not its chemical nature.
Cancer is a disease that involves uncontrolled cell division caused by a genetic mutation. It can occur in almost any region in the body. So, cancer is essentially uncontrolled
of
.
Answer:
Mitosis of specialized cells
Explanation:
Answer:
Mitosis of specialized cells
Explanation:
5. As blood glucose levels increase, hormones are
released to return glucose levels to normal. This
is an example of
(1) a nervous system disorder
(2) the synthesis of antibodies
(3) a stimulus and a response
(4) an antigen and antibody reaction
Answer: i think it an antigen and antibody reaction or a stimulus and a response
As blood glucose levels increase, hormones are released to return glucose levels to normal. This is an example of an antigen and antibody reaction.
What is the hormone that causes the blood sugar level to return to normal?When blood sugar levels drop, glucagon instructs the liver to convert the glycogen back to glucose, causing blood sugar levels to return to normal. Insulin also supports healing after an injury by delivering amino acids to the muscles.
What happens when glucose levels return to normal?After people eat, blood sugar concentrations increase. The pancreas releases insulin automatically to move glucose from the blood to the cells. As more and more cells receive glucose, blood sugar levels return to normal. The liver and muscles store excess glucose as glycogen.
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