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3 years ago

Shallow groove on the surface of the cortex is called a

Biology

1 answer:

nignag [31]3 years ago

5 0

Shallow groove on the surface of the cortex is called sulcus.

Cortex means the outer layer of an inner organ. The outer layer of the cerebrum is called cerebral cortex, where cerebrum occupies the biggest part of the brain. A human being has four lobes of the cerebral cortex which include temporal lobe, parietal lobe, occipital lobe, and frontal lobe.

Cortex has six layers of different types of neurons which are responsible for higher information processing and thinking. Cerebral cortex controls general movement, behavioural reactions, perception and visceral functions. We term the grooved layer as the brain itself.Cerebral cortex consists of large amounts of sulci and gyri(sulcus and gyri in singular). The number of gyri correlates to the processing ability of the animal.A man has big gyri compared to a rat.

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What types of organisms are

algol13

I think the answer is C

4 0

3 years ago

During meiosis homologous chromosomes often twist around each other break exchange segments and rejoin this process usually cont

Annette [7]

Explanation:

Crossing over, or genetic recombination contributes to genetic variation and diversity.

In early Prophase I of meiosis, crossing over occurs. This is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined. The chromosome pairs form tetrads held together at chiasmata.

Further Explanation:

All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. To produce daughter cells, the chromosomes (total number of chromosomes (2n)) are copied before the cell splits into two daughter cells. This process is known as mitosis, and occurs in cell division and growth processes. Two new nuclei are formed, along with identical cells. These are the same as the parent cell and the chromosome number (2n) is maintained. Conversely in meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells (sperm or eggs), each containing half the number of chromosomes as its parent cell.

During the process of prophase I one the nuclear envelope containing chromosomes has only partly broken down homologous chromosomes are joined together by proteins and a complex or pairing call synapsis- corresponding genes on chromatids are aligned precisely. The syanpsis allows for crossing over which is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined.

Crossing over contributes to genetic variation and diversity; novel gene combinations in gametes are formed, which are not present in parent chromosomes. Genetic diversity describes all the genetic characteristics or traits within a species.

Learn more about mitosis at brainly.com/question/4303192

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6 0

3 years ago

In what way do adaptations help the survival of a species?

mylen [45]

Answer:

Explanation:

Adaptation can be described as a process that helps the organisms fit their environment and enhancing their evolutionary fitness (reproductive success). Adaptation makes organism become well-suited for an environment and thus, help them to survive and produce more offspring. Also, adaptation may refer to a phenotypic or adaptive trait with a functional role in the success of each organism in their habitat.

They increase the genetic diversity of the species

3 0

3 years ago

Read 2 more answers

1. _________reproduction is a means of creating new individuals solely by________ the form of cell division that creates genetic

mixer [17]

Answer:

1. asexual, mitosis 2. sexual 3. gametes, meiosis 4. haploid 5. sex cells

Explanation:

Asexual reproduction is the form of reproduction that occurs whereby there is no fusion of gametes or a change in the number of chromosomes. The produced daughter cells are genetically similar to the parent. the form of cell division that occurs here is through a process of mitosis.

Different organisms adopt different type of asexual reproduction including binary fission, spore formation, fragmentation etc.

Sexual reproduction in contrast generates genetically unique organism through the fusion of two different organisms sex cells. To accomplish sexual reproduction, gametes that are haploid through a process of meiosis must be produced which are the egg cell and the sperm cells (the sex cells). These haploid cells are produced only in the germ cells to ensure the production of a diploid zygote.

7 0

3 years ago

13.) A skier on a ski lift is making her way to the top of the ski mountain. As the skier moves higher a. The kinetic energy bei

erik [133]

Answer:

gravitational potential energy

The skier possesses gravitational potential energy at the top of a slope, which transforms into kinetic energy as he moves down the slope.

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3 years ago