Answer: gnetophytes
Explanation:
This is the only division in the gymnosperms that closely resembles the angiosperms (flowering plants) by carrying out double fertilization. Two groups in the gnetophytes division: Ephreda and Gnetum carry out this form of fertilization
Answer:
(look at explanation)
Explanation:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.
The anterior portions of the nasal cavities just inside the nostrils are known as the Vestibules
<h3>
What are nasal vestibules? </h3>
- The nasal vestibule is the area just inside the nostril (nose opening) that leads into the nasal cavity.
- The nasal vestibule contains cartilage of the nose and is lined with tissue that contains small, course hair. These hairs help filter dust, sand, and other particles to stay them from entering the lungs.
- The vestibule of the traditional adult nose is a specialized organ with very characteristic structures and specific functions and is the beginning of each nasal passage. Here the tract makes its first contact with the outside world of air.
- The vestibule is surrounded almost entirely by its half the nasal lobule, bounded laterally by the ala, or wing, medially by the mobile septum and columella, superiorly by the cul-de-sac and limen vestibuli, and posteriorly by the skin lying on the alveolar ridge of the superior maxilla
To learn more about nasal cavity: brainly.com/question/13904748
#SPJ4
Answer:
Before answer this question, you need to know what is the half-life of a compound, the term half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate. Knowing this you know that has passed half of the half-time, so you should probably have 25% of the original amount of 235U. This problem may be tricky because it says half of the time to reach the half-time, but 50% of the compound will be present in 750 million years after the death of the specimen.
Answer: Light goes into the eye via the cornea, it then pass through the pupil, the lens, the vitreous humor and finally forms an image on the retina.
Explanation:
Light goes into the eye via the cornea. The cornea is a clear, dome-shaped surface that covers the front of the eye.
From the cornea, the light passes through the pupil. The pupil regulates the amount of light passing through.
From the pupil, , light hits the lens. The lens is the clear structure inside the eye. It focuses light rays onto the retina.
Subsequently, light passes through the vitreous humor. A clear, jelly-like substance that fills the center of the eye. It helps to keep the eye round in shape.
Finally, the light reaches the retina where the image is formed the image is usually inverted. The retina is a light-sensitive nerve layer that is situated at the back of the eye.
The main function of the optic nerve is to carry the signals to the visual cortex of the brain. The visual cortex turns the signals into images.
