The F1 cross was a cross between two
A. hybrids
B. clones
C. different varieties

Answer:1d2c3b4a

Explanation:

Answer:

Explanation:

A bureaucracy has to justify itself. It always argues that acts in the best interest of those it serves. If it was me answering the question in an essay form I would choose the first choice bureaucracy as part of  my topic sentence.

If you don't believe me, the income tax act in both Canada and the United States (especially in America) is one of the most complex laws ever written. So my answer for you would be Red Tape.

It's formal. It's an organization. It's not always reasonable especially if you have to deal with it. It's stable but not in a good way.

Answer:

red tape

Explanation:

Answer: mutations that natural selection can work on. 4.) How do scientists calibrate a molecular clock? ... they compare the number of positive mutations that have occurred in a particular species with the number of negative mutations that have occurred

Explanation:

Answer:

In immunology, an antigen is a molecule or molecular structure, such as may be present on the outside of a pathogen, that can be bound by an antigen-specific antibody or B-cell antigen receptor. The presence of antigens in the body normally triggers an immune response. Wik

Answer:

Solubilities for gaseous solutes decrease with increasing temperature, while those for most, but not all, solid solutes increase with temperature.

Explanation:

I'm sorry if its wrong

Answer:

Since every person inherited DNA from their parents, who inherited it from their parents, and so on, a person's DNA is made up of the DNA of their ancestors. If you and another person both have the same ancestor, there's a chance that you both inherited some of the same DNA.

Explanation:

Plz mark brainliest thanks

Answer:

food availability, water, and space

Explanation:

hope this helps have a good rest of your night :) ❤

Explanation:

Introduction

Plants have evolved different reproductive strategies for the continuation of their species. Some plants reproduce sexually while others reproduce asexually, in contrast to animal species, which rely almost exclusively on sexual reproduction. Plant sexual reproduction usually depends on pollinating agents, while asexual reproduction is independent of these agents. Flowers are often the showiest or most strongly-scented part of plants. With their bright colors, fragrances, and interesting shapes and sizes, flowers attract insects, birds, and animals to serve their pollination needs. Other plants pollinate via wind or water; still others self-pollinate.

Asexual Reproduction

Vegetative reproduction is a type of asexual reproduction. Other terms that apply are vegetative propagation, clonal growth, or vegetative multiplication. Vegetative growth is enlargement of the individual plant, while vegetative reproduction is any process that results in new plant “individuals” without production of seeds or spores. It is both a natural process in many, many species as well as a process utilized or encouraged by horticulturists and farmers to obtain quantities of economically-valuable plants. In this respect, it is a form of cloning that has been carried out by humanity for thousands of years and by plants for hundreds of millions of years. Sexual Reproduction and The Flower

The flower is the reproductive organ of plants classified as angiosperms. All plants have the means and corresponding structures for reproducing sexually. The basic function of a flower is to produce seeds through sexual reproduction. Seeds are the next generation, serving as the primary method in most plants by which individuals of the species are dispersed across the landscape. Actual dispersal is, in most species, a function of the fruit (a structural part that typically surrounds the seed).

image

Plants and sexual reproduction: Plants that reproduce sexually often achieve fertilization with the help of pollinators such as (a) bees, (b) birds, and (c) butterflies.

Sexual Reproduction in Gymnosperms

Gymnosperms produce both male and female gametophytes on separate cones and rely on wind for pollination.

image

Male and female gametophytes: These series of micrographs shows male and female gymnosperm gametophytes. (a) This male cone, shown in cross section, has approximately 20 microsporophylls, each of which produces hundreds of male gametophytes (pollen grains). (b) Pollen grains are visible in this single microsporophyll. (c) This micrograph shows an individual pollen grain. (d) This cross section of a female cone shows portions of about 15 megasporophylls. (e) The ovule can be seen in this single megasporophyll. (f) Within this single ovule are the megaspore mother cell (MMC), micropyle, and a pollen grain.

Female Gametophyte

The female cone also has a central axis on which bracts known as megasporophylls are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium.

Reproductive Process

Upon landing on the female cone, the tube cell of the pollen forms the pollen tube, through which the generative cell migrates towards the female gametophyte through the micropyle. It takes approximately one year for the pollen tube to grow and migrate towards the female gametophyte. The male gametophyte containing the generative cell splits into two sperm nuclei, one of which fuses with the egg, while the other degenerates. After fertilization of the egg, the diploid zygote is formed, which divides by mitosis to form the embryo. The scales of the cones are closed during development of the seed. The seed is covered by a seed coat, which is derived from the female sporophyte. Seed development takes another one to two years. Once the seed is ready to be dispersed, the bracts of the female cones open to allow the dispersal of seed; no fruit formation takes place because gymnosperm seeds have no covering.

All photosynthetic organisms have chloroplasts. This is definitely false because only photosynthetic eukaryotes have chloroplasts. Thus, the correct option is 1.

Photosynthesis may be defined as a process through which green plants and some photosynthetic algae synthesize their own food with the help of carbon dioxide and water in the presence of sunlight.

Cyanobacteria are the largest and most diverse group of photosynthetic bacteria that perform photosynthesis without having the chloroplast. This type of bacterial organism is generally classified into prokaryotes.

Hence, the chloroplast is only present in the members of photosynthetic organisms that belong to the eukaryotic category.

Therefore, the statement "All photosynthetic organisms have chloroplasts" is definitely false.

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Answer:

Global winds(?)

Explanation: Hope this helps, correct me if I am wrong.

(Edited - Winds, not breezes.)

Answer:

46

Explanation:

23 chromosomes from the egg (mom) and 23 from the sperm (dad)

Answer:

A. a phylogenetic tree. it says that i need 20 more characters to enter so this is me wasting them. but the answer is A

The given diagram basically represents a cladogram. The correct option is D.

A cladogram is a type of diagram that depicts the evolutionary relationships between organisms.

It is a branching diagram in which the nodes represent the descendants' most recent common ancestor. The cladogram is based on the organisms' shared characteristics or traits.

These characteristics, which can be physical or genetic in nature, are used to classify organisms into clades.

Clades are groups of organisms that share a common ancestor, and they are represented on the cladogram as branches.

The organisms are more closely related the closer the branches are to each other. Cladograms are commonly used in biology to study organisms' evolutionary histories.

Thus, the correct option is D.

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Answer:

Explanatsad mad and happyion:

Answer:

the sensation of feeling free, feeling young, and feeling loved..

Explanation:

Theyre happy emotions and often overwhelming but you feel so good from it

pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Answer:Marsupial mammals on Australia likely evolved from a common ancestor. ... Because Australia was isolated by water for millions of years, these species were able to evolve without competition from (or exchange with) mammal species elsewhere in the world.

Explanation:

Answer:

Biogeography is the study of the geographical distributions of biological organisms. For scientists who study evolution, biogeography is often an important part of their analysis, because it provides compelling proof for their theory. This is because many geographical features, such as oceans, rivers, mountains and islands, provide barriers to species, allowing scientists to observe how they evolve separately from one another.

Explanation:

Answer: Look below =3

Explanation: That makes a total of 6 billion base pairs of DNA per cell. Because each base pair is around 0.34 nanometers long (a nanometer is one-billionth of a meter), each diploid cell therefore contains about 2 meters of DNA [(0.34 × 10-9) × (6 × 109)].

Each cell has 1 DNA. When it is mitosis, a piece of DNA breaks down into thing called chromosome.

The best option that describes the role of the small intestine in digestion is (C) it helps in the absorption of nutrients from food.

The small intestine is a vital part of the digestive system, and its main role is to facilitate the absorption of nutrients from the food we eat. After food is partially digested in the stomach, it enters the small intestine, where it is broken down further by enzymes secreted by the pancreas and bile from the liver.

The walls of the small intestine are lined with small finger-like projections called villi, which greatly increase the surface area available for nutrient absorption.

As food passes through the small intestine, nutrients such as carbohydrates, proteins, and fats are absorbed through the villi and into the bloodstream, where they can be transported to the cells throughout the body to be used as energy or for other purposes.

In addition to nutrient absorption, the small intestine also plays a role in the digestion of carbohydrates and proteins, and it helps to regulate the release of digestive enzymes and hormones.

Overall, the small intestine is a crucial component of the digestive system, and its proper functioning is essential for maintaining good health and well-being.

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Answer:

An earthworm's internal organs can be viewed through a dissecting microscope. This type of microscope allows enhanced observation of objects that are too large for a compound microscope. Because the magnification is low, this microscope cannot be used to examine cells.

Answer:

Significance of Photosynthesis. Photosynthesis is the process by which green plants, in the presence of light combine water and carbon dioxide to form carbohydrates. Oxygen is released as a by product of photosynthesis.

Explanation:

Answer:

Diffusion

Explanation:

Facilitated diffusion = carrier mediated transport.

Answer:

A

Explanation:

Hope this helps!!!

The study of developmental biology has been found to show that the closely related species show similarities in embryos. Thus, the correct option is A.

Developmental biology is the branch of science which deals with the study of the process through which an organism such as an animal and a plant grows through and develops with respect to time to more evolved organisms.

Developmental biology includes the biology of regeneration, asexual reproduction of an organism, metamorphosis, and also the growth and differentiation of the stem cells which take place in the adult organisms.

Development of species accomplishes two major objectives which  generates cellular diversity as well as the order within each generation, and it also ensures the continuity of life from one generation to the next generation.

Therefore, the correct option is A.

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Answer:

true

Explanation:

i took the test

The statement "Newton's third law of motion states that whenever a first object exerts a force on a second object. The first object experiences a force equal in magnitude but opposite in direction to the force that it exerts" is true.

His third law argues that there is an equal and opposite reaction to every action (force) in nature. When object A pulls on item B, object B pulls back on object A with an equal and opposing force. In other words, interactions lead to forces.

According to the first law, until a force acts on an item, it will not alter its motion. According to the second law, an object's force is determined by multiplying its mass by its acceleration. According to the third law, when two objects interact, they exert equal-sized and opposite-direction pressures upon one another.

Therefore, the statement is true.

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Answer: No

Explanation:

Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.

Answer:

I Feel Lonely: What To Do When You're Feeling Alonewww.psychalive.org › isolation-and-loneliness

When we are lonely, we are more likely to see things as hopeless. ... There are actions you can take to combat feeling alone and begin to have more ... Because our brains do not respond positively to seclusion, place yourself in social ... PsychAlive PsychAlive is a free, nonprofit resource created by the Glendon Association

Explanation:

eres hermosa e inteligente y mucha gente te quiere así que no dudes de ti mismo así que no te preocupes

The kind of impact this group is having on the environment is removing garbage that could pollute and kill animals, making water cleaner, and more animal life.

When garbage is disposed of on public roads, it causes infrastructure problems and flooding. Upon reaching the rivers, it causes environmental imbalance, representing a great threat to aquatic life, in addition to contaminating the water used for human consumption, making it inappropriate and causing diseases.

With this information, we can conclude that the kind of impact this group is having on the environment is removing garbage that could pollute and kill animals, making water cleaner, and more animal life.

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Answer:

Yes, mixtures can be separated using a variety of techniques.